Reactor building

This section shall contain a description of the reactor building and internal structures (e.g. reactor pools and internals, supporting structures, cranes, ventilation system), emphasizing those characteristics of the building which assist in maintaining acceptable radiation levels on and off the site during all operational states. Information on the requirements for the reactor building is presented in Section 6 of Safety Series No. 35-Sl. 

The description shall include the design basis of the reactor building and internal structures, together with the design basis of the building penetrations (air locks, doors, etc.) regarding their resistance to internal and external events (see paras A.211 and A.307). 

The design and operation of the ventilation systems, including requirements for containment or confinement, shall be described. If applicable, distinction shall be made between the system used during normal operation and the system used for emergencies. The specific efficiencies of the air filters and iodine traps shall be given. 

The design and operation of reactor building subsystems, such as the system for controlling the release of fission products, shall be described. 

The design and operation of cranes or other lifting devices shall be described. 

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Prevent containment overpressure Reactor building spray injection system Reactor building spray recirculation system Reactor building fan coolers Ice condensers Prevent containment overpressure Containment spray injection system, containment spray recirculation system containment fan c ng system, ice conde... 

Seismic analysis of the containment, reactor building, and auxiliary building (including input and response). 

Structural design drawings for typical critical structures such as the lower elevation of the auxiliary building, reactor vessel, containment, reactor building and substructure, and concrete.. 

Intemal Hoods Smali contributor for most plants because of the separation of systems and compartraentalization in the reactor building, but signilic.int for some because of plantspecific designs. Largest contributors involve service water break. 

Moderator make-up capability from the reactor building floor to allow fuel cunimg in ihe event of feeder stagnation break and failure of the ECC system... 

The tire analysis was assisted by SNL using methods described in NUREG/CR-4840 and the extensive operating history and fire experience. For 94 reactor-years from 1958 and 1987, 20 significant fire events were recorded. Hence, frequencies for the reactor building and the diesel generator buildings of 0.12 and 0.03 /y, respectively. A control room fire has never occurred at a SRS reactor. 

Ice and hail, snow, etc. can cause a loss of off-site power. The reactor building was designed to withstand blast pressure of 1,000 Ibs/ft can withstand tornado missile impact (Sharp, 1986). A tornado could damage the reactor by hitting the river water pump houses similar to the flooding scenario. 

Nuclear Power Plant reactor building and cooling tower (left). (Field Mark Publications... 

It IS often stated that unclear fusion tvill produce no radioactive hazard, but this is not correct. The most likely fuels for a fusion reactor would be deuterium and radioactive tritium, which arc isotopes of hydrogen. Tritium is a gas, and in the event of a leak it could easily be released into the surrounding environment. The fusion of deuterium and tritium produces neutrons, which would also make the reactor building itself somewhat radioactive. However, the radioactivity produced in a fusion reactor would be much shorter-lived than that from a fission reactor. Although the thermonuclear weapons (that use nuclear fusion), first developed in the 1950s provided the impetus for tremendous worldwide research into nuclear fusion, the science and technology required to control a fusion reaction and develop a commercial fusion reactor are probably still decades away. 

The plant fire brigade and the local volunteer fire department were notified by the supervisor of the catalyst preparation area by 11 12 A.M. On their arrival to the scene of the fire at 11 15 A.M., the plant fire brigade saw the lead outside operator down about 40 feet from the fire, in between the catalyst preparation area and reactor building No. 1. They also found a seriously burned unknown person about 120 feet from the fire, near the finishing building. (This person was eventually determined to be a service contractor who entered the premises at 10 30 A.M. to calibrate equipment in the instrument house for Reactor No. 1.)... 

Table 7.9 Monthly statistical analysis and concrete mix design summary sheet Area Reactor building...

Mo, J.H., Zhang, Y.P., Yang, R. et al. (2008b) Influence of fins on formaldehyde removal in annular photocatalytic reactors. Building and Environment, 43, 238-45. 

Three men were killed by the blast. Their bodies were saturated with highly contaminated water and particles of fuel had penetrated their skin. Rescue teams evacuated the casualties despite gamma dose rates up to 10 Gy h 1 within the reactor building. 

On the other hand, the IS process in the HTTR-IS system should be built outside and set at an appropriate distance from the reactor building in order to prevent flammable and toxic gas inflow to the building from the reactor safety point of view (Sakaba, 2008). Hence, the secondary cooling system will be modified to penetrate the CV and reactor building in order to provide heat to the IS process. The IHXTR in the HTTR-IS system would result in radionuclide transportation to the outside of the CV. 

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