ML20079A574: Difference between revisions

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Southem Califomia Edison Company 23 PARKER STREET IRVINE, CALIFORNI A 92718 WALTER C. MARSH                                                                         TELEPHONE MOP'.AGEM OF NUCLF" 8tEGULATORY AFF AfRS                                                       (714) 454-4403 U. S. Nuclear Regulatory Commission Document Control Desk Washington, D. C. 20555
Southem Califomia Edison Company 23 PARKER STREET IRVINE, CALIFORNI A 92718 WALTER C. MARSH TELEPHONE MOP'.AGEM OF NUCLF" 8tEGULATORY AFF AfRS (714) 454-4403 U. S. Nuclear Regulatory Commission Document Control Desk Washington, D. C.
20555


==Subject:==
==Subject:==
Docket Nos. 50-361 and 50-362 Special Report - Inoperable Meteorological Instrumentation San Onofre Nuclear Generating Station, Units 2 and 3 In accordance with Technical Specification 3.3.3.4 (a) of Facility Operating Licenses NPF-10 and NPF-15 for San Onofre Units 2 and 3, respectively, Edison is submitting this letter to report one or more channels of the meteorological monitoring instrumentation being inoperable for more than 7 days.
Docket Nos. 50-361 and 50-362 Special Report - Inoperable Meteorological Instrumentation San Onofre Nuclear Generating Station, Units 2 and 3 In accordance with Technical Specification 3.3.3.4 (a) of Facility Operating Licenses NPF-10 and NPF-15 for San Onofre Units 2 and 3, respectively, Edison is submitting this letter to report one or more channels of the meteorological monitoring instrumentation being inoperable for more than 7 days.
          -On February'7,' 1995, the' two delta temperature instrument readings began'to deviate from each other and were declared inoperable. This failure was caused by ele'ctrical~ current                                         i leakage in outdoor signal. wire connectors due to continued California. winter storms. All other meteorological instrumentation remained operable.
-On February'7,' 1995, the' two delta temperature instrument readings began'to deviate from each other and were declared inoperable.
Edison replaced the defective connectors upon the return of fair                                   4 weather, and restored the delta temperature instruments to service on February 21, 1995.
This failure was caused by ele'ctrical~ current i
leakage in outdoor signal. wire connectors due to continued California. winter storms.
All other meteorological instrumentation remained operable.
Edison replaced the defective connectors upon the return of fair 4
weather, and restored the delta temperature instruments to service on February 21, 1995.
If you require any additional information, please let me know.
If you require any additional information, please let me know.
i Sincerely,                                   !
i Sincerely, ah e.
ah e.
9503010263 950223 PDR ADOCK 05000361 S
9503010263 950223 PDR ADOCK 05000361 S                                     PDR-cc:       L.'J. Callan, Regional Administrator, NRC Region IV A'. B. Beach, Director, Division of Reactor Projects, NRC Region IV K. E. Perkins, Jr., Director, Walnut Creek Field Office, NRC Region IV M. B. Fields, NRC Project Manager, Units 2 and 3 J. A. Sloan, Senior NRC Resident Inspector, San Onofre Units 2& 3-010043
PDR-cc:
                                    - - - - -      --                                    t f"f?PD}}
L.'J.
Callan, Regional Administrator, NRC Region IV A'.
B. Beach, Director, Division of Reactor Projects, NRC Region IV K. E. Perkins, Jr.,
Director, Walnut Creek Field Office, NRC Region IV M. B.
Fields, NRC Project Manager, Units 2 and 3 J. A. Sloan, Senior NRC Resident Inspector, San Onofre Units 2& 3-f"f?PD 010043 t}}

Latest revision as of 00:01, 15 December 2024

Informs That One or More Channels of Plant Meteorological Monitoring Instrumentation Inoperable for More than Two Days.On 950207,util Reported That Temp Instrument Readings Deviated Due to Apparent Electrical Current Leakage
ML20079A574
Person / Time
Site: San Onofre  Southern California Edison icon.png
Issue date: 02/23/1995
From: Marsh W
SOUTHERN CALIFORNIA EDISON CO.
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NUDOCS 9503010263
Download: ML20079A574 (1)
v • d • e


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Southem Califomia Edison Company 23 PARKER STREET IRVINE, CALIFORNI A 92718 WALTER C. MARSH TELEPHONE MOP'.AGEM OF NUCLF" 8tEGULATORY AFF AfRS (714) 454-4403 U. S. Nuclear Regulatory Commission Document Control Desk Washington, D. C.

20555

Subject:

Docket Nos. 50-361 and 50-362 Special Report - Inoperable Meteorological Instrumentation San Onofre Nuclear Generating Station, Units 2 and 3 In accordance with Technical Specification 3.3.3.4 (a) of Facility Operating Licenses NPF-10 and NPF-15 for San Onofre Units 2 and 3, respectively, Edison is submitting this letter to report one or more channels of the meteorological monitoring instrumentation being inoperable for more than 7 days.

-On February'7,' 1995, the' two delta temperature instrument readings began'to deviate from each other and were declared inoperable.

This failure was caused by ele'ctrical~ current i

leakage in outdoor signal. wire connectors due to continued California. winter storms.

All other meteorological instrumentation remained operable.

Edison replaced the defective connectors upon the return of fair 4

weather, and restored the delta temperature instruments to service on February 21, 1995.

If you require any additional information, please let me know.

i Sincerely, ah e.

9503010263 950223 PDR ADOCK 05000361 S

PDR-cc:

L.'J.

Callan, Regional Administrator, NRC Region IV A'.

B. Beach, Director, Division of Reactor Projects, NRC Region IV K. E. Perkins, Jr.,

Director, Walnut Creek Field Office, NRC Region IV M. B.

Fields, NRC Project Manager, Units 2 and 3 J. A. Sloan, Senior NRC Resident Inspector, San Onofre Units 2& 3-f"f?PD 010043 t

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