Document: NUREG-0800
Document ID: d0e1f2cb-f296-449d-9f9a-85a571917a44
Document Type: srp
Title: EMERGENCY CORE COOLING SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340709.pdf
Revision Date: 2023-06
Chapter: 6
Section ID: 6.3
CFR Part: 
CFR Title: 

Content:
ion of Regulatory Guide 1.47 (Ref. 11). The primary mode of actuation for the ECCS must be automatic, and actuation must be initiated by signals of suitable diversity and redundance. Provisions should also be made for manual actuation, monitoring, and control of the ECCS from the reactor control room. The design of the ECCS should conform to the recommendations of Regulatory Guide 1.1 (Ref. 9). Design features and operating procedures, designed to prevent damaging water hammer due to such mechanisms as voided discharge lines and water entrainment 6.3-4 Rev. 2 - April 1984 in steam lines shall be provided, in order to meet the requirements of General Design Criterion 4 (Ref. 17). The design of those portions of the system which are not safety related, whose failures could have an adverse effect on the ECCS system, must be in accordance with GDC 2 (Ref. 2), and acceptance is based on meeting Position C2 of Regulatory Guide 1.29 (Ref. 10). Interfaces between the ECCS and component or service water systems must be such that operation of one does not interfere with, and provides proper support (where required) for, the other. In relation to these and other shared systems, e.g., residual heat removal (RHR) and containment heat removal systems, the ECCS must conform to GDC 5 (Ref. 3). The requirements of the following Task Action Plan items must also be satisfied: 1. Task Action Plan Item II.B.8 of NUREG-0718 (Ref. 14) which involves description by the applicants of the degree to which the designs conform to the proposed interim rule on degraded core accidents (CPs and OLs). 2. Task Action Plan Item III.D.1.1 of NUREG-0694 and NUREG-0718 which involves primary coolant sources outside of containment (CPs and OLs). 3. Task Action Plan Item II.E.2.1 of NUREG-0737 which involves reliance on ECCS. 4. Task Action Plan Item II.K.3(10) of NUREG-0737 and NUREG-0718 which involves final recommendations by B&0 task force regarding applicant's proposal of use of anticipatory trips