Document: NUREG-0800
Document ID: c4b10c9f-d82d-4bdd-884b-b83cba562a74
Document Type: srp
Title: Appendix A
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052350158.pdf
Revision Date: 2023-06
Chapter: 15
Section ID: 15.6.5
CFR Part: 
CFR Title: 

Content:
PZ outer boun- dary are determined from Sections 2.1.2 and 2.1.3 of the applicant's SAR and are verified by the reviewer with the Siting Analysis Branch (SAB). 7. The appropriate X/Q values to be used in calculating the consequences of the accident are provided by the assigned meteorologist in accordance with SRP Section 2.3.4. 8. A dose computation model appropriate for the containment system and ESF systems is selected which conservatively represents the transfer of radio- activity from the containment to the environment. The reviewer may find it convenient to sketch a schematic arrangement to illustrate the compart- ments where radioactivity is located, with arrows drawn from one compartment to another indicating transport paths. The leak rates, spray removal rates, ice condenser efficiencies, atmosphere filtration system efficiencies, and flow rates are used to indicate the rates at which the activity moves from one compartment to another. Digital computer codes have been written to perform the actual dose calculation. The analyst selects the code with capabilities that most closely fit the schematic model obtained above. The codes contain a basic library of data which enter into the dose calcula- tion, such as isotopic fission yields, half-lives, energies, and dose conversion factors. 9. The containment leakage doses are combined with the calculated dose con- tributions from all other appropriate post-LOCA transport paths and the total thyroid and whole body LOCA doses are compared with the exposure guideline values of 10 CFR Part 100, §100.11, as discussed in item II.2 of this appendix. If the calculated total doses exceed these guidelines, alternatives which would reduce the doses to an acceptable level are 15.6.5-12 Rev. 1 - July 1981 explored with the applicant. Such alternatives may include increased distance, a different containment type, and more efficient atmosphere filtration or spray systems. IV. EVALUATION FINDINGS The reviewer prepares a table for