Document: NUREG-0800
Document ID: 2f83f917-2d38-4def-9f6a-6368d0c22116
Document Type: srp
Title: SPECTRUM OF ROD EJECTION ACCIDENTS (PWR)
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070721.pdf
Revision Date: 2023-06
Chapter: 15
Section ID: 15.4.8
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CFR Title: 

Content:
nce with 10 CFR 100.11 requires that the exclusion area and the low population zone be defined on the basis of assurances that specified limits will not be exceeded for radiation doses from postulated fission product releases to individuals at the outer boundaries of those regions. The requirements of 10 CFR 100.11 apply to this section because rod ejection accidents are included among the potential accidents for which fission product releases are postulated. Review under SRP Section 15.4.8 determines the source term to be used by the reviewer for Appendix A to this section in evaluating compliance with 10 CFR 100.11. Guidance for determining acceptability of the source term is found in Appendix B to Regulatory Guide 1.77. Meeting these requirements provides assurance that offsite radiation doses from a PWR rod ejection accident will not exceed the guideline doses specified in 10 CFR 100.11.31 III. REVIEW PROCEDURES The reviewer should be guided by the general considerations in the introductory section to this SRP chapter (i.e., SRP Section 15.0).32 DRAFT Rev. 3 - April 1996 15.4.8-4 1. Review of the applicant's analyses, showing that the first of the acceptance 33 criteriacriterion II.1.a above is met, proceeds as follows: a. A spectrum of initial conditions is considered, which must include both zero-power and full-power conditions, at the beginning and end of a reactor fuel 34 cycle (BOC and EOC), to assureensure examination of upper bounds on 35 possible fuel damage. Initial full-power conditions should include the uncertainties in the calorimetric measurement of power. b. From the initial conditions of (a) and from control rod patterns, the limiting rod worth is determined. Where confirmation is considered necessary, the reviewer 36 may calculate, as an audit, the worth of limiting rods. c. Reactivity coefficient values corresponding to the limiting initial conditions must be used at the beginning of the transient. The reviewer checks the reactivity coefficient