ML13302B536

Forwards LERs 86-032-00,86-034-00,86-033-00 & 86-035-00 for Unit 1 & LERs 87-008-00 & 87-009-00 for Unit 2

ML13302B536
Person / Time
Site:	San Onofre
Issue date:	06/03/1987
From:	Morgan H SOUTHERN CALIFORNIA EDISON CO.
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
Shared Package
ML13302B537	List: 05000361/LER-1986-032, :During 860508-870413,eleven Actuations of Toxic Gas Isolation Sys & Three Actuations of Control Room Isolation Sys Occurred.Caused by Power Deenergization. Operating Instruction on Power Transfer Evolutions Modified 05000361/LER-1986-033, :on 860108,low Flow Alarm Observed on Control Room Isolation Sys Train a Control Room Radiation Monitor RI-7824.Caused by Sample Blower Belt Drive Pulley Falling Off Shaft.Pulley & Belt Replaced.Maint Procedures Revised 05000361/LER-1986-034, :During 860107-1109,eight ESF Actuations Occurred During Performance of Maint Activities.Personnel Responded to Each Actuation in Accordance W/Approved Procedures.Circumstances Reviewed by Maint Personnel 05000361/LER-1986-035, :During 860316-870527,15 Spurious Actuations of Train a Containment Purge Isolation Sys Occurred.Caused by Electrical Noise Spikes by Operation of HPSI Sys Components. Detector Replaced & Proper Grounding Confirmed 05000361/LER-1987-008, :on 870219,operating Records Identified Several ESF Actuations.Operating Instructions for Performing Power Transfer Evolutions Will Be Modified to Note That Such Actuations Will Occur & Considered Part of Preplanned Plan 05000361/LER-1987-009, :on 870104,Train B of Containment Purge Isolation Sys Spuriously Actuated by Containment Area Radiation Monitor 3RT-7856.Caused by Movement of Connecting Cable on Panel Door.Personnel Cautioned on Door Usage ML13302B536
References
NUDOCS 8706110077
Download: ML13302B536 (2)

Text

REGU TORY INFORMATION DISTRIBU N SYSTEM (RIDS)

ACCESSION NBR:8706110077 DOC.DATh: 87/06/03 NOTARIZED: NO DOCKET #

FACIL:50-361 San Onofre Nuclear Station, Unit 2, Southern Californi 05000361 50-362 San Onofre Nuclear Station, Unit 3, Southern Californ 05000362 AUTH.NAME AUTHOR AFFILIATION MORGAN,H.E.

Southern California Edison Co.

RECIP.NAME RECIPIENT AFFILIATION Document Control Branch (Document Control Desk)

SUBJECT:

Forwards several LERs describing ESF actuations which occurred between 860101 & 670531.Addl info re to submittal of repts contained in insp rept forwarded by 670415 ltr.

DISTRIBUTION CODE: IE22D COPIES RFCEIVED.LTR I ENCL _ SIZE:/

TITLE: 50.73 Licensee Event Report (LER), Incident Rptp etc.

NOTES:ELD Chandler 1cy.

05000361 ELD Chandler Ic.

05000362 RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME LTTR ENGL ID CODE/NAME LTTR ENGCL PD5 LA 1

1 PD5 PD 1

1 ROODH 1

1 INTERNAL:

ACRS MICHELSON 1

1 ACRS MOELLER 2

2 AEOD/DOA 1

1 AEOD/DSP/ROAB 2

2 AEOD/DSP/TPAB3 1

1 DEDRO 1

1 NRR/DEST/ADE 1

0 NRR/DEST/ADS 1

0 NRR/DEST/CEB 1

1 NRR/DEST/ELB 1

1 NRR/DEST/ICSB 1

1 NRR/DEST/MEB 1

1 NRR/DEST/MTB 1

1 NRR/DEST/PSB 1

1 NRR/DEST/RSB 1

1 NRR/DEST/SGB 1

1 NRR/DLPG/HFB 1

1 NRR/DLPG/GAB 1

1 NRR/DOEA/EAB 1

1 NRR/DREP/RAB 1

1 NRR/DREP/RPB 2

2 NRR/RMAS/ILRB 1

1 NRR/PMAS/PTSB 1

1 15%

02 1

1 RES DEPY G1 1

1 RON5 FILE 01 1

1 EXTERNAL: EQ&G GROHM 5

5 H ST LOBBY WARD 1

1 LPDR 1

1 NRC PDR 1

1 NSIC HARRISJJ 1

1 NSIC MAYS,G 1

1 NOTES:

1 1

TQTAL NUMBER OF COPIES REQUIRED: LTTR 43 ENCL 41

Southern California Edison Company SAN ONOFRE NUCLEAR GENERATING STATION P.O. BOX 128 SAN CLEMENTE, CALIFORNIA 92672 H.E.MORGAN TELEPHONE STATION MANAGER June 3, 1987 1714) 368-6241 U. S. Nuclear Regulatory Commission Document Control Desk Washington, D.C. 20555

Subject:

Docket Nos. 50-361 and 50-362 ESF Actuation Licensee Event Reports (LERs)

San Onofre Nuclear Generating Station, Units 2 and 3 In accordance with USNRC Region V Confirmatory Action Letter (Mr. J. B. Martin to Mr. Harold B. Ray dated April 20, 1987), this submittal provides LERs describing Engineered Safety Feature (ESF) actuations which occurred between January 1, 1986 and May 31, 1987. Additional information related to the submittal of such reports is contained in an inspection report forwarded to SCE by Mr. A. E. Chaffee letter to Mr. Kenneth P. Baskin, dated, April 15, 1987.

As noted in the inspection report, SCE provided the basis for its interpretation regarding the reportability of certain ESF actuations in a letter dated March.5, 1987 from Mr. H. E. Morgan to Mr. P. Johnson (NRC Region V).

Each of the events reported in the attached LERs was considered by SCE, at the time, to be ESF actuations that did not meet the reporting requirements of 10 CFR 50.73.

In accordance with the Confirmatory Action Letter SCE has modified appropriate procedures to require that any ESF actuation, that is not "pre-planned" as part of a normal evolution, be reported to the NRC pursuant to 10 CFR 50.72 and 50.73.

If there are any questions regarding the above, please contact me.

Sincerely,

Enclosure:

LER Nos. 2-86-032, 033, 034 and 035 3-87-008, and 009 cc:

F. R. Huey (USNRC Senior Resident Inspector, Units 1, 2 and 3)

J. B. Martin (Regional Administrator, USNRC Region V)

Institute of Nuclear Power Operations (INPO) 8706110077 870603 PDR ADOCK 05000361 S

PDR