B10 Assembled
B10 Assembled – Patent Pending
B10 Overhead
B10 Overhead – Patent Pending

The B10 is a fully rated 900 ft3 basement shelter with performance data, radiation ratings, and a warranty. The B10 is a self-contained 1 psi NBCE shelter that is assembled in secret in the basement of a house. The B10 disaster shelter is designed to protect 5 adults indefinitely off-grid. The product was specifically designed and developed to protect people during and after disasters such as tornadoes, hurricanes, earthquakes, storms, forest fires, power failures, nuclear power plant accidents, nuclear/chemical terrorism, HEMP attacks, and full-scale protracted nuclear, chemical and biological war. A tremendous effort has been made to think of every conceivable incident that shelterists could face in the B10 shelter. The B10 includes all the steel beams to be assembled in a basement, all the steel shielding, door, SEAM NBC air filtration system, counter, kitchen sink, two full rated adult bunk beds, 12- volt battery system, DC electrical system, AC electrical system, all wiring, all plumbing, etc. The 92,000 lb. B10 is shipped in four open bed truck loads and off-loaded by hand into the basement through the basement windows and basement stairwell.


The B10 contains 900 ft3 and 150 ft2 floor space with headroom of 6 ft. There is ample light for reading anywhere in the shelter supplied by LED white lights. Fresh filtered air is brought into the shelter by a 12-volt air blower designed to operate 24 hours per day and supplies many times the breathing volume of air required by adults. This system has the advantage of maintaining constant shelter temperature, constant shelter oxygen levels, constant shelter carbon dioxide levels, and constant shelter moisture levels, plus it prevents overheating which is common with manual air blowers in warm climates. In addition, this electric blower air supply system works with all people including young children, people who are sick, people who are injured, people who are handicapped, and people who are elderly who may not be able to operate a manual blower system during a disaster. Exhausting of hot, moist, spent air is facilitated through the air exhaust duct near the ceiling.


NORAD shelters are designed to meet MIL-STD-188-125A:” High Altitude Electromagnetic Pulse (HEMP) Protection for Ground-Based C4I Facilities Performing Critical, Time-Urgent Missions Part 1: Fixed Facilities” 17 July 1998. All mission essential equipment (MEE) vulnerable to EMP is mounted in a tested aluminum EMP shielded enclosure. All NORAD shelters are self-contained and not connected to the electrical grid. The only MEE equipment in the B10 shelter that are vulnerable to EMP are the inverter/charger, solar charge controller, and solar panels which are all mounted in an aluminum EMP shielded enclosure. The EMP shielded enclosures meet QQ-A-200/8, MIL-C-7438, MIL-T-10727, and shielding minimums of MIL-188-125. The shelter system also includes a 2 ft3 EMP vault to store other electronic components in such as laptops, radios, TV’s, CD player etc. The golden rule for EMP protection in underground shelters is, “DO NOT USE THE SHELTER HULL AS AN EMP SHIELD AND DO NOT USE THE EMP SHIELD AS A SHELTER”. The major problem in making underground shelters EMP safe, is dealing with all the POEs or “points of entry’ in underground shelter hulls that allow EMP to enter the shelter. Anything penetrating the hull such as entranceways, emergency escape tunnels, air inlet hoses, air outlet hoses, water hoses, electrical lines, and radio cables, etc., all need EMP shielded gaskets and/or EMP shielded air vents. Steel cannot usually be used as a Faraday Cage because it is not conductive enough. Electrical conductivity is measured in Siemens/meter (õ S/m). The minimum conductivity for a Faraday Cage to shield an EMP is 15,000,000 Siemens per meter. Steel has a conductivity of only 7,000,000 S/m so it is not conductive enough to effectively attenuate all EMP frequencies. Aluminum has a conductivity of 35,000,000 S/m and copper 60,000,000 S/m so both materials are very well suited for a Faraday Cage to effectively shield EMP. Bad welds, corroded welds, etc. in the shelter hull are all POEs making equipment in the shelter vulnerable to EMP. The NORAD approach to making an underground shelter EMP shielded, and a well-accepted military practice, is to assume the shelter hull is EMP transparent and shield each individual unit vulnerable to EMP. The POEs in a shielded enclosure for a few cables are small and can be easily shielded. Also, unlike underground shelters, EMP shielded enclosures can be tested individually. Underground shelters with certified EMP shielded enclosures for MEE (Minimum Essential Equipment) meet the MIL-188-125A Standard. All of the NORAD shelter models, have been reviewed for an EMP Protection Analysis by a Certified Electromagnetic Compatibility Engineer and a Certified Electrostatic Discharge Control Engineer and found to comply with MIL-STD-188-125A with shielded enclosures for MEE.

The B10 Basement Shelter includes the following:
Steel beam structure epoxy coated that bolts together
Steel columns with spread steel base plates- total load on basement floor is less than 2400 lbs./ft2
Steel plate siding epoxy coated that bolts to structural beams
9.5 in think steel shielding totaling 64,600 lbs. in 40 lb. plates
Wooden end walls and one door
Wooden bathroom walls
Stainless steel bathroom/shower floor
1950 solid concrete blocks for two sides of the structure
SEAM air filtration systems for NBC environments- 100 cfm with ducts and hoods
Battery bank 8-140 AH AGM deep cycle batteries
2-LED lights
Toilet flush
Sewage lift station
2 steel full bunk beds fully rated for adults
Kitchen counter and sink
Water filtrations system
Alcohol Stove with 5 gallons of methanol
Kitchen table with 4 chairs
1000 gallon water tank and 12 volt water pump
B10 Overhead
B10 Overhead – Patent Pending


The B10 Shelter is supplied with a 1 KW solar system and an AGM battery bank. During peace time, a 120 VAC battery charger maintains the battery bank. After an EMP event, the solar panels that have been stored in the supplied EMP shielded enclosure, can be put in place to supply power indefinitely. The NORAD EMP Shielded Power Cell can also be used to power the shelter and the whole house after an EMP attack or cyber-attack for long periods.


Inverters convert DC power of the battery bank to 120 VAC power or house current. The inverter/charger is located inside an aluminum/nickel EMP shielded enclosure meeting QQ-A-200/8, MIL-C-7438, MIL-T-10727 and MIL-188-125 shielding.


The B10 SHELTER is normally connected to the house septic tank.


The NORAD B10 has a modern air filtration system called a SEAM unit. (Severe Environment Air Module). The SEAM unit is unit is dedicated to the breathing air for life support. The Nuclear-Biological-Chemical or NBC S.E.A.M. is a “Bag-In/Bag Out” NBC air filtration system designed for long-term operation in severe NBC environments. The NBC filter housing is made of stainless steel. In order to qualify as a long-term NBC air filtration system for more than 30 days, the filter trays have to be able to be removed and replaced. The trays are replaced using a “bag in bag out” system so there is no human contact with the contaminated filter elements. On the front side of the filter housing is a vacuum dial gage which indicates when the filter is operating normally and when the filters need to be changed. In the case where the shelter is located near a nuclear air, ground, or surface burst detonation putting fallout into the atmosphere, any Pre-Filter in any air filtration system located in the shelter will become too radioactive and dangerous to the shelterists to keep in the filter housing even though the vacuum gage may read normal. The level of radioactivity in the filter comes from radioactive contaminants in the Pre-Filter and HEPA filter tray which can be measured by a radiation meter by just standing in front of the access doors and holding the radiation meter at the center of the access cover. When the reading is above 1 rad/hr., the Pre-Filter and maybe the HEPA filter should be changed. Almost all of the initial fallout will have fallen in the first 24 hours so changing these filters should automatically be implemented after this period. Specific procedures are found in the B10 OPERATOR MANUAL for replacing filter elements.

The SEAM system supplies 100 cfm of fresh NBC filtered air and operates 24 hours per day. The air filtration system consists of three stages of air filtration. The first stage is a disposable Pre-Filter to remove physical particles. The second stage is a filter tray of ASZM TEDA carbon to remove radioactive iodine gas and chemical warfare agents with a minimum residence time of 0.3 seconds. Each carbon tray weighs approximately 35 lbs. and can be changed by one person in approximately ten minutes. For extended Sealed Shelter Atmosphere durations, a Lithium Hydroxide carbon scrubber tray can be used. One Lithium Hydroxide tray will remove enough carbon dioxide for ten people to stay in the shelter for approximately 24 hours… The final stage is a HEPA filter to remove physical particles that are 0.3 microns and larger at 99.999% efficiency. The top of the NBC filter housing has a gas agent test port to test for chemical agents using the supplied Chemical Agent Test Kit. A radiation survey meter is also supplied.


Storage of food, toilet paper and other items is stored in the wall cavity and under the full bunk bed.


Air enters and exits the shelter through the air intake hood which is mounted on the outside of the house. The spent breathing air containing carbon dioxide, heat, moisture, and odors exits the shelter near the ceiling of the shelter at the opposite end to the SEAM air filtration system and exits to the atmosphere at ground level through the basement floor joist cavity.


The B10 is designed to accept water from a 1,000 gallon tank, supplied, and stored somewhere in the basement.

B10 Sealed Shelter Atmosphere
B10 Sealed Shelter Atmosphere – Patent Pending


When ground fires are present around the hatch, the air blower should not be turned on to bring in fresh air. During this time, the shelterists must breathe in a sealed shelter atmosphere. The safe duration time is based on a 3% carbon dioxide limit. The time it takes for the shelter atmosphere to reach this limit is a function of the number of shelterists, degree of physical activity of the shelterists, and the volume of the shelter above the floor. Sealed Shelter Atmosphere graphs are provided for each specific shelter.


Water Filter-The shelter is equipped with a sub-micron water filter for all water used at the kitchen sink, shower, and toilet. The counter contains a large stainless-steel utility sink where dishes, clothes, and pets are washed. The sink, shower, and toilet, drain into a sewage lift station which transfers sewage up to the house septic system. The toilet room is in negative pressure 24 hrs./day venting all odors to the ground surface.

Toilet– The toilet used is a conventional flush toilet draining into the sewage lift station under the bathroom floor. The sewage is pumped up to the house septic tank through an internal and external hose.

Cooking –The NORAD B10 uses an alcohol stove.


The protection factor (PF) of a shelter is the ratio of a radiation dose over smooth ground which would be received by an unprotected person, compared to the dose that would be received by a person in a sheltered location. The B10 has a PF or Protection Factor of 256 which means a person inside the B10 would receive l/256th of the radiation outside of the shelter. The Half Value Layer Thickness (HVL) is the material thickness required to reduce the radiation dose to half. A PF of 256 is attained by 44 inches Earth, or 32.1 inches of concrete or 9.6 inches of steel, or 6.4 inches of lead. Radiation shielding from overhead in the B10 is provided by 9.6 inches of steel plate weighing 64,900 lbs. in the ceiling of the structure

The B10 has a TRS (Total Rems in Shelter) of 33 rems at 1 psi (2.5 miles from GZ of a 100 KT weapon). This 30-day dose is based on a 100 KT surface burst to maximize radiation fallout. (See of PRINCIPLES of PROTECTION, U.S. Handbook of NBC Weapon Fundamentals and Shelter Engineering Standards, Sixth Edition, 737 pp, 2013). A shelters’ radiation dose must always be connected to the shelter’s overpressure rating.

Based on the worst cancer cases (leukemia) from the Hiroshima and Nagasaki victims, a 10-rem dose may increase the cancer rates from the current rate of 352/100,000 up to 355/100,000. It should be kept in mind that the Hiroshima victims were totally unprepared and uneducated. They were malnourished and already suffering from many diseases during a critical wartime period where food, medical supplies, and other necessities were in short supply. In addition, they were not only exposed to heavy, acute external radiation doses but also internal radiation doses from eating contaminated food and inhaling radioactive fallout. Educated shelterists can avoid such damaging effects and can determine the radiation levels with a simple radiation survey meter supplied with the B10 along with a chemical agent detection kit. Any fallout shelter must be designed to operate off-grid for a minimum of 30 days which is the time it takes for the radiation level to return to normal.

Beware of Misinformation About Radiation Shielding

There are many old civil defense shelter drawings that instruct people how to build very inexpensive basement shelters. The problem is that they never state the outside radiation dose these shelters are designed to resist or how close to ground zero the shelter is designed to be located. Most have a protection factor or PF of 64 so the people inside the shelter would then receive 1/64th of the outside radiation dose. If the shelter is 5 miles away from a small 100 KT surface burst, the outside radiation dose would be approximately 6,379 rems. This means the people inside this shelter would receive 1/64th or 100 rems which is a sickly dose. They are cheap because they do not really provide much protection. Sickness doses may become lethal if medical help is not available.

Effects Rems
50% Lethal 200-450
radiation sickness 50-200
blood effect 25-50
safe 0-25


U.S. citizens have a legal right to install a shelter. Under the second amendment of the United States Constitution, U.S. citizens are guaranteed the right to bear arms to provide protection in life threatening situations. Tornadoes, earthquakes, nuclear, biological, and chemical warfare fall under this amendment as life threatening forces. A disaster shelter falls under this classification as a defensive arm. The NORAD shelters are considered a temporary structure that can be redeployed to another location.


The communications center consists of a HAM radio and scanner radio mounted inside a EMP shielded vault enclosure per MIL-STD-188-125, and two antennas are to be mounted on the roof of the house.


NORAD SHELTER SYSTEMS LLC® Warranties that the structural parts of the B10 Disaster Shelter will not fail for 30 years provided that 1) the shelter is properly assembled, 2) the shelter is not exposed to excessive overpressure, 3) The structural parts of the shelter are not modified. 4) the shelter is maintained in compliance to the NORAD B10 SHELTER SYSTEMS’s Operator’s Manual. NORAD SHELTER SYSTEMS is continuously improving its designs and therefore reserves the right to change any specification without notice. We shall not be liable for any indirect or consequential damages, labor, or installation costs for any claim.


  1. The customer signs an Agreement with NORAD SHELTER SYSTEMS to manufacture, deliver, and install the shelter system.
  2. The shelter parts are shipped on four trucks to the job site and off-loaded by the NORAD crew into the basement.
  3. The crews assembles the shelter in the location chosen by the NORAD engineer and customer.
  4. The crew installs the steel radiation shielding barrier
  5. The shelter is fit-out with NBC air filtration system, power system, lights, toilet, counter, beds, etc.
  6. NORAD SHELTER SYSTEMS supervisor will run through Alpha trials with customer.
Air blower type Reverse curve centrifugal
Air blower volume 12-VDC 100 cfm @ 1 in S.P.
Air filter HEPA 99.99% @ .3 u
Air filter-carbon-activated residence time 0.3 sec
Air filter-carbon-TEDA residence time 0.3 sec
Air Inlet/Outlet aluminum hood
Assembly time 10-days
Backfill material required none
Batteries 8- 140-amp hour 12 VDC AGM
Capacity-adults 4+ 1 sleeping on floor
Circuit Breaker Protection AC and DC
Connector port to other shelters NA
Corrosion Protection System Epoxy coated steel
Engineering Standards used to manufacture US Handbook of Shelter Eng. Standards 2013
Failure mode non-catastrophic
Fire resistance interior flame spread 25, ASTM E84
Floor space 150 ft2
Floor material basement concrete floor
Head room 6 ft. depending on basement ceiling height
Hull material steel epoxy coated
Lighting white LED
Max .wind NA
Overpressure – allowable 1 psi
Radiation Protection Factor -Gamma 256 @ 9.5 inches of steel
Radiation Protection Factor -Neutron 0
Radiation from overhead 33 rems @ 1 psi 100 KT S.B.
Radiation -Total Rems in Shelter (TRS) 33 rems @ 1psi 100 KT SB
Septic Tank home owner’s septic tank
Sewage Lift Station 1/2 HP
Shape structural box
Shower stainless base
Shipping Weight 92,000 lbs. plus concrete blocks
Storage volume under bed
Toilet gravity flush to lift station
Volume-Total 900 ft3

NOTE: Ceiling height is determined by height of basement wall. Shelter length can be extended in 2 ft. increments.