Document: NUREG-0800
Document ID: 87477809-7581-4701-b6f2-91410029e1c8
Document Type: srp
Title: MAIN STEAM SUPPLY SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0703/ML070380206.pdf
Revision Date: 2023-06
Chapter: 10
Section ID: 10.3
CFR Part: 
CFR Title: 

Content:
The applicant has met the requirements of GDC 5 with respect to the capability of shared systems and components important to safety to perform required safety functions. The NRC staff has reviewed the interconnections from the MSSS of each unit to. The interconnections are designed so that the capability to mitigate the consequences of an accident in either unit and achieve safe shutdown in that unit is retained, without reducing the capability of the other unit to achieve safe shutdown. Alternatively, each unit of the plant has its own MSSS with no interconnections between the safety-related and nonsafety-related portions. 3. The applicant has met the requirements of GDC 34 with respect to the system function of transferring residual and sensible heat from the reactor system in PWR plants. The MSSS can provide heat sink capacity and pressure relief capability and can supply steam to the steam-driven, safety-related pumps necessary for safe shutdown. The MSSS design includes the capability to operate the atmospheric dump valves remotely 10.3-14 Revision 4 - March 2007 from the control room following an SSE coincident with the loss of offsite power so that a cold shutdown can be achieved by depending on only safety-grade components. This approach meets the positions in Branch Technical Position 5-4 and in Issue 1 of NUREG-0138. 4. The applicant has met the requirements of 10 CFR 50.63 with respect to MSSS capacity and capability for responding to an SBO. Acceptance is based on meeting the guidance of Regulatory Guide 1.155, Positions C.3.2, C.3.3, and C.3.5. For DC and COL reviews, the findings will also summarize the staff’s evaluation of requirements and restrictions (e.g., interface requirements and site parameters) and COL action items relevant to this SRP section. In addition, to the extent that the review is not discussed in other SER sections, the findings will summarize the staff's evaluation of the ITAAC, including design acceptance criteria, as