ML20197G252
| ML20197G252 | |
| Person / Time | |
|---|---|
| Site: | Columbia  |
| Issue date: | 02/02/1984 |
| From: | Noonan V Office of Nuclear Reactor Regulation |
| To: | Schwencer A Office of Nuclear Reactor Regulation |
| References | |
| CON-WNP-0732, CON-WNP-73, CON-WNP-732 NUDOCS 8402130296 | |
| Download: ML20197G252 (2) | |
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DISTRIBU m N FEB 2 1984 Central File EQB Reading File MEMORANDUM FOR:
Albert Schwencer, Chief Licensing Branch No. 2 Division of Licensing FROM:
Vincent S. Noonan, Chief Equipment Qualification Branch Division of Engineering
SUBJECT:
REMOVAL 0F RCIC SYSTEM FROM EQ PROGRAM AT WNP-2 Reference 1:
Letter from G. C. Sorensen (WPPSS) to A. Schwencer (NRC) dated July 26, 1983; subject as above.
Reference 2:
Memo for V. S. Noonan from B. Sheron dated December 15, 1983; subject as above.
The Washington Public Power Supply System indicated in Reference 1 its intent to remove the RCIC system from the WNP-2 equipment qualification (EQ) program.
After a review and evaluation, the Reactor Systems Branch recommended that the RCIC system be maintained in the WNP-2 EQ program (Reference 2).
As a result of further review, the Equipment Qualification Branch, with concurrence from the Reactor Systems Branch, has concluded that the RCIC system may be removed from the WNP-2 EQ program as indicated by WPPSS.
This conclusion is based on the following considerations:
Credit for RCIC system operation has not been taken in any design basis event analysis.
Because of this the RCIC system falls outside the scope of equipment requiring environmental qualification as defined by 10 CFR 50.49(b)(1);
i.e., " equipment relied upon to remain functional during and following design basis events."
Exemptions of the RCIC system from the EQ program have been approved for other applicants (ex. Susquehanna).
Unquantified risk increase by itself is not adequate reason to require maintenance of this equipment in the EQ program.
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DISTRIBUTION C/entral File EQB Reading File MEMORANDUM FOR:
Albert Schwencer, Chief Licensing Branch No. 2 Division of Licensing FROM:
Vincent S. Noonan, Chief Equipment Qualification Branch Division of Engineering
SUBJECT:
REMOVAL OF RCIC SYSTEM FROM EQ PROGRAM AT WNP-2 Reference 1:
Letter from G. C. Sorensen (WPPSS) to A. Schwencer (NRC) dated July 26, 1983; subject as above.
Reference 2:
Memo for V. S. Noonan from B. Sheron dated December 15, 1983; subject as above.
The Washington Public Power Supply System indicated in Reference 1 its intent to remove the RCIC system from the WNP-2 equipment qualification (EQ) program.
After a review and evaluation, the Reactor Systems Branch recommended that the RCIC system be maintained in the WNP-2 EQ program (Reference 2).
As a result of further review, the Equipment Qualification Branch, with concurrence from the Reactor Systems Branch, has concluded that the RCIC system may be removed from the WNP-2 EQ program as indicated by WPPSS.
This conclusion is based on the following considerations:
Credit for RCIC system operation has not been taken in any design basis event analysis.
Because of this the RCIC system falls outside the scope of equipment requiring environmental qualification as defined by 10 CFR 50.49(b)(1); i.e., " equipment relied upon to remain functional during and following design basis events."
Exemptions of the RCIC system from the EQ program have been approved for other applicants (ex. Susquehanna).
Increased risk by itself is not adequate reason to require main-tenance of this equipment in the EQ program.
Vincent S. Noonan, Chief Equipment Qualification Branch Division of Engineering cc:
R. Vollmer R. Auluck N
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