ML13331B061
| ML13331B061 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 07/29/1988 |
| From: | Trammell C Office of Nuclear Reactor Regulation |
| To: | Baskin K Southern California Edison Co |
| References | |
| TAC-67902 NUDOCS 8808180300 | |
| Download: ML13331B061 (5) | |
Text
July 29, 1988 4
Docket No. 50-206 DISTRIBUTION Docket File NRC & LPDRs CTrammell (2)
Mr. Kenneth P. Baskin GHolahan Vice President JLee Southern California Edison Company OGC-White Flint 2244 Walnut Grove Avenue PDV Plant File Post Office Box 800 EJordan Rosemead, California 91770 BGrimes ACRS (10)
JStewart JKnox HRichings
Dear Mr. Baskin:
SUBJECT:
NUCLEAR INSTRUMENTATION SYSTEM UPGRADE (TAC NO. 67902)
Re:
San Onofre Nuclear Generating Station, Unit No. 1 In reviewing your amendment application dated April 15, 1988, relating to the nuclear instrumentation system upgrade, we have determined that the additional information identified in the enclosure is needed to continue our
.review. In order to maintain our review schedule, your response is requested within 30 days of your receipt of this letter.
The reporting and/or recordkeeping requirements contained in this letter affect fewer than ten respondents; therefore, OMB clearance is not required under Pub. L.96-511.
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 I rIII, 0 CL IV31 V and Special Projects C,-0 cc, 0f 0/
Enclosure:
OU Request for Additional Information C0 OQ I:ia cc w/enclosure:
0o See next page 0c D5 SELB DR 5
CTrall:
FRos on C/88
/fgY8
/8 88
&8 8/8o OFFICIAL RECORD COPY
July 29, 1988 Docket No. 50-206 DISTRIBUTION Docket FiTe NRC & LPDRs CTrammell (2)
Mr. Kenneth P. Baskin GHolahan Vice President JLee Southern California Edison Company OGC-White Flint 2244 Walnut Grove Avenue PDV Plant File Post Office Box 800 EJordan Rosemead, California 91770 BGrime0 ACRS
- 0)
JStewart JKnox HRichings
Dear Mr. Baskin:
SUBJECT:
NUCLEAR INSTRUMENTATION SYSTEM UPGRADE (TAC NO. 67902)
Re:
San Onofre Nuclear Generating Station, Unit No. 1 In reviewing your amendment application dated April 15, 1988, relating to the nuclear instrumentation system upgrade, we have determined that the additional information identified in the enclosure is needed to continue our review. In order to maintain our review schedule, your response is requested within 30 days of your receipt of this letter.
The reporting and/or recordkeeping requirements contained in this letter affect fewer than ten respondents; therefore, OMB clearance is not required under Pub. L.96-511.
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
Enclosure:
Request for Additional Information cc w/enclosure:
See next page DS SELB D
5 CTranell:
FRosA i
on
/ q88
,/&88
/88 OFFICIAL RECORD COPY
gA REG(,
++0 oUNITED STATES 0
NUCLEAR REGULATORY COMMISSION o
WASHINGTON, D. C. 20555 July 29, 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:
NUCLEAR INSTRUMENTATION SYSTEM UPGRADE (TAC NO. 67902)
Re:
San Onofre Nuclear Generating Station, Unit No. 1 In reviewing your amendment application dated April-15, 1988, relating to the nuclear instrumentation system upgrade, we have determined that the additional information identified in the enclosure is needed to continue our review. In order to maintain our review schedule, your response is requested within 30 days of your receipt of this letter.
The reporting and/or recordkeeping requirements contained in this letter affect fewer than ten respondents; therefore, OMB clearance is not required under Pub. L.96-511.
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
Enclosure:
Request for Additional Information cc w/enclosure:
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
ENCLOSURE REQUEST FOR ADDITIONAL INFORMATION CONCERNING A DC SYSTEM DESIGN AND TECHNICAL SPECFICATION CHANGE DATED APRIL 15, 1988 SAN ONOFRE, UNIT 1
- 1) Provide a description of the proposed design change (i.e., the upgrade replacement of the NIS) as it relates to the dc and ac electric power systems.
- 2) In support of the replacement upgrade of the Nuclear Instrumentation System (NIS), as indicated by letter dated April 15, 1988, the upgrade of the NIS will increase the dc system load. As a consequence of this increased load, the margin of safety for dc system capacity and capability will be reduced. The significant hazards consideration analysis (which states that the revision to the battery test acceptance criterion from 80 to 85 percent will serve to ensure that an existing safety margin is maintained) does not adequately address reduced margin of safety for dc system capacity and capability due to increased load.
For each component part of the dc system (battery, charger, and distribution system components) that will be required to supply the increased load, provide the results of your analysis which demonstrates that the dc system can adequately accommodate the increased load.
- 3) The significant hazards consideration analysis states that the battery specification revision (i.e., acceptance criteria for battery capacity revised from 80 to 85 percent) provides assurance that the system is tested in a manner consistent with its recalculated duty cycle.
It is not clear how replacing a battery when its capacity reaches 85 percent assures a battery is capable of meeting its duty cycle. Provide the results of an analysis to indicate the extent to which recommendations of IEEE Standard 485-1983 have been followed in assuring adequately sized batteries at San Onofre Unit 1.
- 4) Section 4.2.5 of the Safety Review Report for the NIS indicates that each redundant channel set of the NIS is energized from a separate ac power source. This section, thus implies that there will be four physically and electrically separated ac sources supplying the NIS.
Verify that this is so and provide a description of these power sources and their physical and electrical separation. If this in not the case, provide the results of an analysis which demonstrates that the existing electric power system design, which will supply the new NIS design, will not compromise the independence requirement for the NIS.