ML20196A793
| ML20196A793 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 01/04/1999 |
| From: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | Ray H SOUTHERN CALIFORNIA EDISON CO. |
| Shared Package | |
| ML20196A741 | List: |
| References | |
| 50-361-98-14, 50-362-98-14, NUDOCS 9906220312 | |
| Download: ML20196A793 (2) | |
See also: IR 05000361/1998014
Text
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UNITED STATES
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NUCLEAR REGULATORY COMMISSION
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REGION IV
611 RYAN PLAZA DRIVE, sulTE 400
ARLINGTON, TEXAS 76011-8064
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January 4,1999 -
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Harold B. Ray, Executive Vice President
Southern California Edison Co.
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San Onofre Nuclear Generating Station
P.O. Box 128
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San Clemente, Califomia 92674-0128
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SUBJECT: NRC INSPECTION REPORT NO. 50-361/98-14; 50-362/98-14 AND NOTICE OF
VIOLATION
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Dear Mr. Ray:
From October 19 through November 6,1998, a safety system engineering inspection and a
safety evaluation inspection were conducted at your San Onofre Nuclear Generating Station,
Units 2 and 3 reactor facilities. Additional in-office review of information provided by your staff
. was conducted following completion of the onsite inspection and the exit interview.- On
December 17,1998, the results of this inspection were discussed with Jeff Cook of your staff.
The enclosed report presents the results of that inspection.
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The NRC assessed the capability of the component cooling water system and supporting
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control systems. On the basis of our review, we concluded that the component cooling water
system was capable of performing its safety function. We also noted that your procedure for
the safety evaluation program was not consistent with NRC's interpretation of 10 CFR 50.59,
" Changes, Tests, and Experiments." However, your procedure included additional
management controls for the areas of exception and the NRC did not identify any cases where
these areas of exception had resulted in your staff inappropriately approving changes to the
. facility as described in the Updated Final Safety Analysis Report.
Based on the results of this inspection, the NRC has determined that a violation of NRC
requirements occurred. Since original construction, the design basis to properly classify the
electrical control of component cooling water miniflow control valves that was specified in the
' license application, was not properly translated into the plant design. The violation is cited in
the enclosed Notice of Violation (Notice) and the circumstances surrounding the violation are
described in detail in the enclosed report. This violation is of concern because your staff had
two prior opportunities to correct this issue. Please note that you are required to respond to this
letter and should follow the instructions specified in the enclosed Notice when preparing your
response. The NRC will use your response, in part, to determine whether further enforcement
action is necessary to ensure compliance with regulatory requirements.
One unresolved item was identified concerning control of the thermal performance of the
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auxiliary salt water / component cooling water heat exchangers. This matter is discussed in
Section E2.2 of the enclosed ins'pection report. This item is unresolved pending NRC review of
the results of your planned testing to better estimate the total tube wall fouling of these heat
exchangers and your evaluation of past operability. Additionalinspection is also planned to
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confirm that the mathematical models used by your staff to analyze the impact of macro-fouling
are conservative.
9906220312 990615
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ADOCK 05000361
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JUN l 51999
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San Onofre Nuclear Generating Station
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E-Mail report to T. Frye (TJF)
E-Mail report to D. Lange (DJL)
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E-Mail report to NRR Event Tracking System (IPAS)
E-Mail report to Document Control Desk (DOCDESK)
E-Mail report to Richard Correia (RPC)
E-Mail report to Frank Talbot (FXT)
bec to DCD (IE01)
bec distrib. by RIV:
Regional Administrator
Resident inspector
DRP Director
DRS-PSB
DRS Director
MIS System
Branch Chief (DRP/E)
RIV File
Senior Project inspector (DRP/E)
Branch Chief (DRP/TSS)
DOCUMENT NAME: R:\\_SO23\\SO814RP.COR
To receive copy of document, Indicate in box: "c" = copy without enclosures "E" = Copy with enclosures "N" = No copy
RIV.SPE:D_RP/ E
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OFFICIAL RECORD COPY
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