ML20054J383
| ML20054J383 | |
| Person / Time | |
|---|---|
| Site: | Indian Point, North Anna, Diablo Canyon, 05000000 |
| Issue date: | 10/01/1980 |
| From: | Savio R Advisory Committee on Reactor Safeguards |
| To: | Advisory Committee on Reactor Safeguards |
| Shared Package | |
| ML20033C447 | List: |
| References | |
| FOIA-82-176 NUDOCS 8206280560 | |
| Download: ML20054J383 (1) | |
Text
-
a%(
~~
~
a f %
NUCLEAR REGULATORY COMMISSION f/
y*
Ig) f gl i
ADVISORY COMMITTEE ON REACTOR SAFEGUARDS
~//
?
1 WASHINGTON, D. C. 20555 October 1, 1980 MEMORANDUM FOR: ACRS Memtprs 1
&tG-l FROM:
R. Savio, S aff Engineer o
SUBJECT:
OCTOBER 11, 1980 SAFETY PHILOSOPHY, TECHNOLOGY, AND CRITERIA SUBCOMMITTEE REPORT The Safety Philosophy, Technology, and Criteria Subcommittee is scheduled to meet on October 1980 to discuss the Diablo Canyon seismic interaction study and Commissioner Gilinsky's questions on the North Anna LPI and RHR systems.
I will have distributed the meeting summary for this October 8th meeting be-fore the scheduled October 11, 1980 Subcommittee report.
The Diablo Canyon study was performed in response to ACRS recommendations. The study treats only systems interactions which could be induced by a seismic event.
It is intended that future studies on other plants will involve non-seismic as well as seismic initiators. The analysis performed for Diablo Canyon depended heavily on "walkdown" analysis by the teams of engineers (Pacific Gas and Electric acted as their own Architect Engineer). Potential system inte nc-tions were noted and, as necessary, investigated further.
Independent audits of this work were performed by PG&E's Quality Assurance Department, a PGLE review board, and the NRC Staff. The manpower resources invovled are estimated at 50-manyears.
I have included the Applicant's description of this program as.
A draft of the NRC Staff's Safety Evaluation Report (SER) has been distributed to the Subcommittee.
I will distribute the completed SER to the Comittee as socn as it is available. The Committee is currently scheduled to discuss this work at the November 6-8, 1930 Full Committee meeting. A more generic program is being carried out by the NRC Staff and is expected to involve the development of guidance on methods (Draft report in early 1981) and system interaction review of Indian Point-3 and six other not yet selected LWR plants.
I have included the NRC Staff's current schedule as Attachment 2.
Commissioner Gilinsky has asked the ACRS consider the desirability of adding a heat exchanger to the North Anna LPI system and environmentally qualifying the RHR system for accident conditions.
I have included a summary of his con-cerns and some backgrcund material as Attachment 3.
The NRC Staff's response is included as Attachment 4.
I will report on these discussions in the meeting summary repert.
Attachments: As stated g6g60 '820512 NCNURR A82-176 PDR
-