Document: NRC Regulatory Guide
Document ID: da2e0703-3488-44b0-b6d0-089aac7cae3d
Document Type: regulatory_guide
Title: Format and Content of Plant-Specific Pressurized Thermal Shock Safety Analysis Reports for Pressurized Water Reactors
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML0037/ML003740028.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.154
CFR Part: 
CFR Title: 

Content:
een- ing c r i t e r i o n . Effective 1 year a f t e r the pub1 i c a t i o n o f t h i s regulatory guide, Section 50.61 requires t h a t these analyses be completed 3 years before the screening c r i t e r i o n would be exceeded t o allow adequate time f o r implementation on the p l a n t o f any corrective actions assumed i n the analyses before the plant operates above the screening c r i t e r i o n . , This regulatory guide describes a format and content acceptable t o the NRC s t a f f f o r these plant-specific PTS safety analyses and describes acceptance c r i t e r i a t h a t the NRC s t a f f w i l l use i n evaluating licensee analyses and pro- posed corrective measures. The references l i s t e d i n t h i s guide include a set o f analyses sponsored by the NRC that, taken together, constitute an example o f the analyses described by t h i s guide. The s t a f f recommends t h a t these references be extensively used, along w i t h t h i s guide, by those performing the plant-specific PTS analyses re- quired by the PTS rule, § 50.61. References 1, 2, and 3, f o r example, each represent an analysis by the Oak Ridge National Laboratory (ORNL) predicting through-wall crack frequency f o r one PWR. These references w i l l provide guid- ance through the analyses. Reference 3 (analysis o f H. B. Robinson) should be most helpful because it was the l a s t one performed and includes the experience gained i n performing the two e a r l i e r analyses. Objectives o f Plant-Specific PTS Safety Analysis Reports Paragraph 50.61(b)(4) requires t h a t a licensee whose p l a n t w i l l exceed the screening c r i t e r i o n before expiration o f the operating license submit safety analyses t o determi ne what, i f any, modi f i c a t i ons t o equipment, systems, and *To avoid confusion among several (preexisting) s l i g h t l y d i f f e r e n t d e f i n i t i o n s of RTNDT, !$ 50.61 contains i t s own d e f i n i t i o n o f an RTNDT (called RTpTS) t o be