Submits Voluntary LER 94-001 Re Actuation of Train a of Toxic Gas Isolation Sys.Event Not Reportable Due to Preplanned Requirements of TS
Person / Time
ML20064M022
Site:	San Onofre
Issue date:	03/14/1994
From:	Kreiger R SOUTHERN CALIFORNIA EDISON CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20064L996	List: 05000361/LER-1994-001, Submits Voluntary LER 94-001 Re Actuation of Train a of Toxic Gas Isolation Sys.Event Not Reportable Due to Preplanned Requirements of TS
References
NUDOCS 9403280076
Download: ML20064M022 (1)
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LER-1994-001, Submits Voluntary LER 94-001 Re Actuation of Train a of Toxic Gas Isolation Sys.Event Not Reportable Due to Preplanned Requirements of TS

Event date:
Report date:
3611994001R00 - NRC Website
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text

6 Southem Califomia Edison Company P O box 128 S AN CL E M E NT E. C ALWORNI A 92674 0128 "2,,*,"]f ',"

March 14, 1994

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Nuclear Regulatory Commission Document Control Desk Washington, D.C.

20555

Subject:

Docket Nos'. 50-361 and 50-362 voluntary Report Licensee Event Report No.94-001 San Onofre Nuclear Generating Station, Units 2 and 3 This submittal provides a voluntary Licensee Event Report (LER) for an occurrence involving manual actuation of Train A of the Toxic Gas Isolation System in accordance with Technical Specification 3.3.2 Action B.

Since this occurrence involves a shared system between Units 2 and 3, a single report for Unit 2 is being submitted in accordance with NUREG-1022.

Neither the health nor the safety of plant personnel or the public was affected by this occurrence.

Edison believes that this event is not reportable because the actuation:

(1) was a preplanned requirement of the Technical Specifications, and (2) the system was not responding to a valid signal; rather, it was a precautionary action due to the inoperability of a fire damper.

However, the reporting requirements for this occurrence are unclear.

Edison is pursuing clarification of the reporting requirements through the current i

review and comment process for the proposed Revision 1 to NUREG-1022, " Licensee Event Report System".

If you require any additional information, please so advise.

SJn,erely, c

/ NfV,

Enclosure:

LER No.94-001 cc:

Perkins, Jr.,

Acting Regional Administrator, USNRC Region V J.

Sloan, USNRC Senior Resident Inspector, Units 2 and 3 M.

Fields, NRC Project Manager, San Onofre Units 2 & 3 Institute of Nuclear Power Operations (INPO)

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Licensee Event Report

San Onofre

70 | 71 | 72 | 73 | 74 | 75 | 76 | 77 | 78 | 79 | 80 | 81 | 82 | 83 | 84 | 85 | 86 | 87 | 88 | 89 |

90 | 91 | 92 | 93 | 94 | 95 | 96 | 97 | 98 | 99 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 |

10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 |

		Reporting criterion
05000362/LER-1994-001-01, :on 940416,channel B Containment Emergency Sump Level Lumigraph Indicator 3LI-9389-2 Observed W/No Light Bars Illuminated.Caused by Failure of Level Signal Converter 3LY-9389-2.Failed Signal Converter Replaced	on 940416,channel B Containment Emergency Sump Level Lumigraph Indicator 3LI-9389-2 Observed W/No Light Bars Illuminated.Caused by Failure of Level Signal Converter 3LY-9389-2.Failed Signal Converter Replaced	10 CFR 50.73(a)(2)(v), Loss of Safety Function 10 CFR 50.73(a)(2)(iv), System Actuation 10 CFR 50.73(a)(2)(i) 10 CFR 50.73(a)(2)(x) 10 CFR 50.73(a)(2)(iii) 10 CFR 50.73(a)(2) 10 CFR 50.73(a)(2)(1)
05000361/LER-1994-001, Submits Voluntary LER 94-001 Re Actuation of Train a of Toxic Gas Isolation Sys.Event Not Reportable Due to Preplanned Requirements of TS	Submits Voluntary LER 94-001 Re Actuation of Train a of Toxic Gas Isolation Sys.Event Not Reportable Due to Preplanned Requirements of TS
05000362/LER-1994-002-01, :on 940912,momentary Loss of Voltage on Class 1E 4 Kv Bus 3A06 & Loss of Voltage Signal Occurred Due to Jarring of door-mounted Protective Relay.Normal Power to Bus 3A06 Restored within 72 H Allowed by TS	on 940912,momentary Loss of Voltage on Class 1E 4 Kv Bus 3A06 & Loss of Voltage Signal Occurred Due to Jarring of door-mounted Protective Relay.Normal Power to Bus 3A06 Restored within 72 H Allowed by TS	10 CFR 50.73(a)(2)(v), Loss of Safety Function 10 CFR 50.73(a)(2)(iv), System Actuation 10 CFR 50.73(a)(2)(i) 10 CFR 50.73(a)(2)(x) 10 CFR 50.73(a)(2)(iii) 10 CFR 50.73(a)(2) 10 CFR 50.73(a)(2)(viii)(A)
05000361/LER-1994-002, :on 940328,noted That 18 Month TS Visual Insp May Not Have Been Performed.Cause Was Inattention to Detail During Rev.Corrective Action:Util Revised Rmos to Correctly Ref Surveillance Procedures	on 940328,noted That 18 Month TS Visual Insp May Not Have Been Performed.Cause Was Inattention to Detail During Rev.Corrective Action:Util Revised Rmos to Correctly Ref Surveillance Procedures	10 CFR 50.73(a)(2)(v), Loss of Safety Function 10 CFR 50.73(a)(2)(iv), System Actuation 10 CFR 50.73(a)(2)(i) 10 CFR 50.73(a)(2) 10 CFR 50.73(a)(2)(viii)(A) 10 CFR 50.73(a)(2)(viii)(B) 10 CFR 50.73(a)(2)(1)
05000361/LER-1994-004, :on 940619,HPSI Pump P017 Was Removed from Service & Declared Inoperable.Caused by Incomplete & Inadequate Evaluation of Work Planned for P017 & ME417.All Equipment Personnel Have Received Training	on 940619,HPSI Pump P017 Was Removed from Service & Declared Inoperable.Caused by Incomplete & Inadequate Evaluation of Work Planned for P017 & ME417.All Equipment Personnel Have Received Training	10 CFR 50.73(a)(2)(v), Loss of Safety Function 10 CFR 50.73(a)(2)(vii), Common Cause Inoperability 10 CFR 50.73(a)(2)(iv), System Actuation 10 CFR 50.73(a)(2)(i) 10 CFR 50.73(a)(2)(x) 10 CFR 50.73(a)(2)(iii) 10 CFR 50.72(b)(3)(ii), Degraded or Unanalyzed Condition 10 CFR 50.73(a)(2) 10 CFR 50.73(a)(2)(viii)(A)
05000361/LER-1994-005, :on 941012,voluntary TS 3.0.3 Entry Due to Declaring Both Trains of ECCS Inoperable in Mode 1.Util Replaced 2PCV6418 W/Qualified in-kind Replacement Valve	on 941012,voluntary TS 3.0.3 Entry Due to Declaring Both Trains of ECCS Inoperable in Mode 1.Util Replaced 2PCV6418 W/Qualified in-kind Replacement Valve	10 CFR 50.73(a)(2)(v), Loss of Safety Function 10 CFR 50.73(a)(2)(iv), System Actuation 10 CFR 50.73(a)(2)(i) 10 CFR 50.73(a)(2)(x) 10 CFR 50.73(a)(2)(iii) 10 CFR 50.72(b)(3)(ii), Degraded or Unanalyzed Condition 10 CFR 50.73(a)(2) 10 CFR 50.73(a)(2)(viii)(A) 10 CFR 50.73(a)(2)(viii)(B)
05000361/LER-1994-006, :on 941023,violation of TS 6.2 Shift Manning Occurred.Caused by Misunderstanding of Control Room Area Boundaries.Administrative Procedure SO123-0-30 Revised.W/	on 941023,violation of TS 6.2 Shift Manning Occurred.Caused by Misunderstanding of Control Room Area Boundaries.Administrative Procedure SO123-0-30 Revised.W/	10 CFR 50.73(a)(2)(v), Loss of Safety Function 10 CFR 50.73(a)(2)(vii), Common Cause Inoperability 10 CFR 50.73(a)(2)(iv), System Actuation 10 CFR 50.73(a)(2)(i) 10 CFR 50.73(a)(2)(x) 10 CFR 50.73(a)(2)(iii) 10 CFR 50.72(b)(3)(ii), Degraded or Unanalyzed Condition 10 CFR 50.73(a)(2)(viii)(A) 10 CFR 50.73(a)(2)(viii)(B) 10 CFR 50.73(a)(2)(1)
05000361/LER-1994-012, :on 940126,inadequacies in Electrical Distribution Sys Design Calculations.Caused by Incorrect Engineering Judgement.C/A:Upgraded MCC Control Circuit for 2HV9303 by Replacing Transformer	on 940126,inadequacies in Electrical Distribution Sys Design Calculations.Caused by Incorrect Engineering Judgement.C/A:Upgraded MCC Control Circuit for 2HV9303 by Replacing Transformer	10 CFR 50.73(a)(2)(v), Loss of Safety Function 10 CFR 50.73(a)(2)(iv), System Actuation 10 CFR 50.73(a)(2)(i) 10 CFR 50.73(a)(2)(x) 10 CFR 50.73(a)(2) 10 CFR 50.73(a)(2)(viii)(B) 10 CFR 50.73(a)(2)(1)

05000361/LER-1994-001, Submits Voluntary LER 94-001 Re Actuation of Train a of Toxic Gas Isolation Sys.Event Not Reportable Due to Preplanned Requirements of TS

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