Document: NUREG-0800
Document ID: dcd79479-0633-4d67-ba17-e369513aa55d
Document Type: srp
Title: SPECTRUM4 OF ROD EJECTION ACCIDENTS (PWR)
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052350410.pdf
Revision Date: 2023-06
Chapter: 15
Section ID: 15.4.8
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Content:
REVIEW RESPONSIBILITIES Primary - Core Performance Branch (CPB) Secondary - Accident Evaluation Branch (AEB) 1. AREAS OF REVIEW The CPB evaluates the consequences of a control rod ejection accident in the area of physics. The review covers the possible initial conditions, rod patterns and worths, scram worth as a function of time, adequacy of the various reactivity coefficients, adequacy of the calculational methods, and any core parameters which affect the peak reactor pressure or the probability of fuel rod failure. The relevant thermal-hydraulic analyses are reviewed under SRP Section 4.4. The AEB reviews, as part of its secondary review responsibility, described in the appendix to this SRP section, the radiological consequences of a rod ejection accident by using a source term for dose calculations based on the amount of failed fuel as obtained by CPB from the reactor core analyses. The evaluation finding provided is as indicated in the attached Appendix. The applicant's determination of the reactor trip delay time, i.e., the time elapsed between the instant the sensed parameter reaches the level for which protective action is required and the onset of negative reactivity insertion, is reviewed under SRP Sections 7.2 and 7.3. II. ACCEPTANCE CRITERIA CPB acceptance criteria are based on meeting the requirements of General Design Criterion 28 (Ref. 1) as it relates to the effects of postulated reactivity accidents neither resulting in damage to the reactor coolant pressure boundary greater than limited local yielding, nor causing sufficient damage to impair significantly the capacity to cool the core. Rev. 2 - July 1981 USNRC STANDARD REVIEW PLAN Standard review plans are prepared for the guidance of the Office of Nuclear Reactor Regulation staff responsible for the review of applications to construct and operate nuclear power plants. These documents are made available to the public as part of the Commission' s policy to Inform the nuclear Industry and the general