ML13330B365
| ML13330B365 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 07/28/1988 |
| From: | Trammell C Office of Nuclear Reactor Regulation |
| To: | Baskin K SOUTHERN CALIFORNIA EDISON CO. |
| References | |
| TAC-62998, NUDOCS 8808220166 | |
| Download: ML13330B365 (5) | |
Text
o 0UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 July 28, 1988 Docket No. 50-206 Mr. Kenneth P. Baskin Vice President Southern California Edison Company 2244 Walnut Grove Avenue Post Office Box 800 Rosemead, California 91770
Dear Mr. Baskin:
SUBJECT:
ROOF LOADINGS - IPSAR SECTION 4.6.2 (TAC NO. 62998 Re:
San Onofre Nuclear Generating Station, Unit No. 1 This letter outlines our understanding of the current status of IPSAR Section 4.6.2 - Roof Loadings - and requests action on your part to resolve this item.
On October 21, 1987, we had a conference call with your staff to discuss the results of our review of this item. You were informed of the following:
- 1. The depth of ponding for the Ventilation Building Roof is 8.1 inches compared to the licensee's value (SCE letter dated April 26, 1985) of 5.3 inches.
- 2. The dept of ponding for the Fuel Storage Building roof is 9.7 inches compared to the licensee's va.lue of 9.07 inches.
- 3. The staff's values were based on orifice flow through the scuppers and an orifice coefficient of 0.65.
- 4. The staff does not agree with the licensee's assumption of short tube flow through the scupper because the flow length is too short. Unless the licensee can provide a sound bases for short tube flow, it should not be assumed since the assumption is non-conservative.
- 5. Since the differences between licensee and staff ponding depths are rooted in engineering judgement, we discussed providing additional weir flow length that would insure that ponded rainfall could be removed without infringing on structural margins of safety.
883082201668SSO728:
PDR ADOCK 05000206 P
-2 You indicated that SCE would review this information, but unfortunately no date was set for a response. With the long passage of time since the conference call, it would appear that this matter has been overlooked.
We ask that you respond to the comments such that this issue can be resolved.
A response within 30 days of your receipt of this letter is requested.
Please contact us if you should have any questions regarding this request.
Sincerely, Charles M. Trammell, Senior Project Manager Project Directorate V Division of Reactor Projects -
- III, IV, V and Special Projects cc: See next page
Mr. Kenneth P. Baskin San Onofre Nuclear Generating Southern California Edison Company Station, Unit No. 1 cc Charles R. Kocher, Assistant Mr. Jack McGurk, Acting Chief General Counsel Radiological Health Branch James Beoletto, Esquire State Department of Health Southern California Edison Company Services Post Office Box 800 714 P Street, Office Bldg. 8 Rosemead, California 91770 Sacramento, California 95814 David R. Pigott Mr. Hans Kaspar, Executive Director Orrick, Herrington & Sutcliffe Marine Review Committee, Inc.
600 Montgomery Street 531 Encinitas Boulevard, Suite 105 San Francisco, California 94111 Encinitas, California 92024 Mr. Robert G. Lacy Mr. Dennis M. Smith, Chief Manager, Nuclear Radiological Programs Division San Diego Gas & Electric Company Governor's Office of Emergency Svcs.
P. 0. Box 1831 State of California San Diego, California 92112 2800 Meadowview Road Sacramento, California 95832 Resident Inspector/San Onofre NPS U.S. NRC P. 0. Box 4329 San Clemente, California 92672 Mayor City of San Clemente San Clemente, California 92672 Chairman Board of Supervisors County of San Diego 1600 Pacific Highway Room 335 San Diego, California 92101 Director Energy Facilities Siting Division Energy Resources Conservation &
Development Commission 1516 - 9th Street Sacramento, California 95814 Regional Administrator, Region V U.S. Nuclear Regulatory Commission 1450 Maria Lane, Suite 210 Walnut Creek, California 94596
-2 You indicated that SCE would review this information, but unfortunately no date was set for a response. With the long passage of time since the conference call, it would appear that this matter has been overlooked.
We ask that you respond to the comments such that this issue can be resolved.
A response within 30 days of your receipt of this letter is requested.
Please contact us if you should have any questions regarding this request.
Sincerely, original signed by Charles M. Trammell, Senior Project Manager Project Directorate V Division of Reactor Projects -
- III, IV, V and Special Projects cc: See next page DISTRIBUTION Docket File OGC NRC & LPDR PDV Plant File CTrammell (2)
EJordan GHolahan BGrimes JLee ACRS (10)
GBagchi GStaley
)FC :
DV/PM :DRSP/ PDV iAME : rammell:CW GWK i hon
)ATE0/2 /88
- 0
/88 OFFICIAL RECORD COPY
-2 You indicated that SCE would review this information, but unfortunately no date was set for a response. With the long passage of time since the conference call, it would appear that this matter has been overlooked.
We ask that you respond to the comments such that this issue can be resolved.
A response within 30 days of your receipt of this letter is requested.
Please contact us if you should have any questions regarding this request.
Sincerely, original signed by Charles M. Trammell, Senior Project Manager Project Directorate V Division of Reactor Projects -
- III, IV, V and Special Projects cc:
See next page DISTRIBUTION Docket File OGC NRC & LPDR PDV Plant File CTrammell (2)
EJordan GHolahan BGFimes JLee ACRS (10)
GBagchi GStaley NAME : rammell:CW GWK ihon DATE.0/ 1/88
- Of/j /88 OFFICIAL RECORD COPY