ML25196A198
| ML25196A198 | |
| Person / Time | |
|---|---|
| Issue date: | 07/20/1977 |
| From: | Bender M Advisory Committee on Reactor Safeguards |
| To: | NRC/OCM |
| References | |
| Download: ML25196A198 (1) | |
Text
UNITED $TATES NUCLEAR Rt:GULATORY COMMISSION AOVl~.)RY COMMITTEE ON Rl:ACTOR SAFEGUARDS WASHINGTON, D. C, 20555 united States Nuclear Regulatory Corrmission Washington, oc 20555 July 20, 1977 S"u'BJECT:
REPORl' ON '!HE FWOR PIOOEER, INC. BALA}..V::E OF PLANr S?ANDARD SAFETY ANALYSIS REPORl' (BOPSSAR) AS APPLIED 'ID 'fflE WESTIOO-IDUSE ELECTRIC a>REORATICN RESAR-41 NSSS DESIGN
Dear Comniss i.oners:
During its 207th meeting, July 14-15, 1977, the hlvisory Comnittee on Re-actor Safeguards completed its review of the application of Fluor Pioneer, Inc. for Preliminary Design Approval of; its BOPSSAR, a standardized nuclear balance of plant (BOP) t:esign that would interface with a single unit Westinghouse Electric Corporation, RESAR-41 pressurized-water reactor nuclear steam supply system (NSSS).
A review of the RF.SAR-41 design was completed at the 185th meeting of the Comnittee and was discussed in its report of September 18, 1975. A Subcomnittee meeting was held with rep-resentatives of Fluor Pioneer, L"'lc. and the Nuclear Regulatory COnmis-sion (NRC) Staff in Washington, OC on June 28, 1977. n.iring its review the COmnittee had-the benefit of discussions with the Applicant and the NRC Staff and of the documents listed.
The arrangement of BOPSSAR provides extensive physical separation of critical safety-related eguipnen~ to protect against conm::>n mode failures associated with fires or other operational contingencies.
However, canplete design detailc; for BOPSSAR have not been developed and the concept has not yet been applied to~ complete nuclear power plant design. Consequently, further review of the physical separation arrangement should be made prior to the Final Design Approval or when BOPSSAR is proposed for a nuclear power plant for which a construction permit is being sought.
The Comnittee believes that the safety-related interface requirements between BOPSSAR and RESAR-41 NSSS designs, and between BOPSSAR and the custom-designed site-related structures arid components, are satisfactory for a Preliminary Design Approval, but expects the NRC Staff and the Applicant to examine them in greater depth when a construction permit application is received.
2185
Comnissior1ers 2 -
July 20, 1977 The coordination of interdependent instruirentation and controls of the NSSS.:nd BOP will require attention at the time when BOPSSAR is used as a portion of a nuclear power plant license application. The Comnittee reconmer.ds that these matters be included in the NRC Staff's Standard Review Plan.
Although BOPSSAR and RESAR-41 include provisions for protection against imustrial sabotage, the Comnittee believes that further steps can be taken beyond those provided. Before a construction permit referencing BOPSSAR and RESAR-41 is issued for a nuclear power plant, the Utility-Applicant should be required to deronstrate that acceptable provisions to preclude or to mitigate the COl?,Sequences of industrial sabotage will be incorporated into the plant design.
'l'he BOPSSAR design includes sane provisions which anticipate the main-tenance, inspection, and operational needs of the plant'throughout its service life, including cleaning and decontamination of the primary coolant system, and eventual deconmissioning. However, when BOPSSAR is used as a :p<;>rtion of a nuclear power plant license application the Com-mittee believes that the NRC Staff and the Applicant should further re-view methods and procedures for renoving accumulated contamination whereby maintenance and inspection programs and ultimate deconmissioning can be mre effectively and safely carried out.*
Generic problems related to large water*reactors are discussed in the Comnittee's report dated February 24, 1977. Those problems relevant to.
BOPSSAR and RESAR-41 should be d~alt with appropriately by the NRC Staff anc: the Utility-Applicant as solutions are found.
The Advisory Committee on Reactor Safeguards believes that the items men-tioned above should be given further consideration during the plant licens-ing process and that, if due con:::;ideration is given to the foregoing, Pre-lim1na.11* Design :.pproval of BOPSSAR for use in conjunction with RESAR-41 can be granted in accord with the spirit and purposes set forth in the Com-mission's policy stateirent on standardization of nuclear power plants.
References Sincerely yours,
- l,t.~
M. Bender Chairman
- 1. Fluor Pioneer, Inc. Balance of Plant Standard Safety Analysis Rep:>rt, BOPSSAR, Volwres 1 through 8 and Amendments 1 through 10
- 2. Report to the Advisory Conmittee on Reactor Safeguards in the Matter of Fluor Pioneer, Inc. Balance of Plant Standard Safety Analysis Reoort June 3, 1977 by the U.S. Nuclear Regulatory Conmission, Office of Nuclear Reactor Regulatioo 2186