Document: NUREG-0800
Document ID: 42e7682f-df25-4a6a-94f4-7d44ea029702
Document Type: srp
Title: STEAM SYSTEM PIPING FAILURES INSIDE AND OUTSIDE OF CONTAINMENT
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070677.pdf
Revision Date: 2023-06
Chapter: 15
Section ID: 15.1.5
CFR Part: 
CFR Title: 

Content:
a rapid reduction of reactor coolant temperature and steam generator pressure. A subsequent reactor trip can further reduce the primary system pressure, producing a void within the pressure vessel and creating the need for emergency core cooling. As noted above, the severity of this transient is assessed by the applicant in the SAR and is reviewed by the staff in accordance with this SRP section. Meeting the requirements of GDC 35 provides assurance that a system will be available for providing abundant core cooling, thereby ensuring that the core will be effectively cooled and that any clad metal-water reaction will be limited to negligible amounts in the event of a transient initiated by a steam system pipe break.45 III. REVIEW PROCEDURES The procedures below are used during both the construction permit (CP), and operating license (OL), and combined license (COL) reviews. During the CP review, the values of system 46 parameters and setpoints used in the analysis will be preliminary in nature and subject to change. At the OL or COL review stage, final values should be used in the analysis, and the reviewer 47 should compare these to the limiting safety system settings included in the proposed technical specifications. 1. The reviewer determines the acceptability of the analytical models and assumptions, as follows: a. The values of system parameters and initial core and system conditions used as input to any analytical model are reviewed by RSBSRXB. Of particular importance are (1) the reactivity coefficients and control rod worths used in the analysis and (2) the variation of moderator temperature, void, and Doppler coefficients of reactivity with core life. The reviewer will evaluate the justification provided by the applicant to show that he has selected the core burnup that yieldings the minimum margins has been selected. is evaluated. 48 CPB is consulted regardingSRXB also reviews core-related parameters such as 49 DNB correlations and the values of the