05000362/LER-1987-001, :on 870109,discovered That 18-month Surveillance of Instrument Line Snubbers Not Performed. Caused by Clerical Error.Review of All Snubber Documents Included in Snubber Svc Life Program

:on 870109,discovered That 18-month Surveillance of Instrument Line Snubbers Not Performed. Caused by Clerical Error.Review of All Snubber Documents Included in Snubber Svc Life Program

ML20210U372
Person / Time
Site:	San Onofre
Issue date:	02/09/1987
From:	Morgan H SOUTHERN CALIFORNIA EDISON CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
LER-87-001, LER-87-1, NUDOCS 8702180463
Download: ML20210U372 (2)

LER-1987-001, on 870109,discovered That 18-month Surveillance of Instrument Line Snubbers Not Performed. Caused by Clerical Error.Review of All Snubber Documents Included in Snubber Svc Life Program

Event date:
Report date:
Reporting criterion:	10 CFR 50.73(a)(2)(iv), System Actuation 10 CFR 50.73(a)(2)(vii), Common Cause Inoperability 10 CFR 50.73(a)(2)(1) 10 CFR 50.73(a)(2) 10 CFR 50.73(a)(2)(viii)(B) 10 CFR 50.73(a)(2)(iii)
3621987001R00 - NRC Website

text

lN C Faerm 366 U.56 NUCLEAR REGULATORY COMMIS$40N

, (9/8 3)

APPROVE 3 OMB NOL 31504104 LICENSEE EVENT REPORT (LER)

ExP'aES: */3 '/**

m.u,v.A.. (, i

.....,.....(.)

PAaE m SAN ONOFRE NUCLEAR GENERATING STATION, UNIT 3 015 l0 l0 l0131612 1 l0Fl 011 vera (.)

18-MONTH SURVEILLANCE OF INSTRUMENT LINE SNUBBERS NOT PERFORMED QVENT DATE (B)

LER NUMBER (4)

REPORT DATE (7)

OTHER FACILITIES INVOLVED (8) rac'uv' aa"

• ** "' T "u " * * " ( * )

,,fR,,,

y,," ",p,, monvu may vaan u nt =

oav vaan vaan 0 l5 l0 l0 l0 l [ l 01 1 01 9 8

7 81 7 01011 01 0 012 01 9 81 7 0l5l0j0l0l l l THIS REPORT IS SUBMITTED PURSUANT TO THE RECIUIREMENTS OF 10 CFR (Checle one or more of the following) (11) c; E R A TIN G

" " I'I 5

20.402(b) 20.40 5(c) 50.73(a)(2)(iv) 73.71(b)

WER 20.405(a)(1)(1) 50.36(c)(1) 50.7 3(a)(2)(v) 73.71(c)

(Ioi 01Ol 0 20 405(a)(1)(ii) 50.36(c)(2) 50.73(a)(2)(vii)

QER (Specify Abstract 20.405(a)(1)(iii) 1 50.73(a)(2)(1) 50.73(a)(2)(vill}(A)

Form 366A) 20.405(a)(1)(lv) 50.73(a)(2)(li) 50.73(a)(2)(viii)(B) 20.405(a)(1)(v) 50.73(a)(2)(iii) 50.7 3(a)(2)(x)

LICENSEE CONT ACT FO R THIS LER (12)

MrMJ TELEPHONE NUMBER a.......

H. E. MORGAN. STATION MANAGER 7!1l4 316lAl-l612l411 COMPLETE ONE UNE FOR EACH COMPONENT FAILURE DESCRIBED IN THl3 REPORT (13)

"",,"y"**

"8,",[,",8,

f TO.e[BBS causs sy st e m c oas sem e est cause sy sy s ee c ome nON E NT TU R E I

III III I

IIl l II I

III III I

III III SUPPLEMENT AL REPORT EXPECTED { t 4)

WomTM oav vaan Su sMINO N lYES M M*$ $ *rE y lNO l

)

DATE(1al

.4bstract (Limit to 1400 spaces. t.o., approximately fif teen single-space typewritten tones) (16)

On 1/9/87, with Unit 3 in Mode 5, during a review of snubber documentation, it was found that two tandem snubbers on a 3/4 inch instrument line had not been included in the Technical Specification 4.7.6 surveillance program, therefore the inspections and testing required by Technical Specification 4.7.6 were not performed.

On January 10, 1987 both snubbers were visually inspected and functionally tested satisfactorily.

The instrument line is connected to the Component Cooling Water (CCW) (EIIS System Code CC) return line from the gas stripper hotwell. The snubbers (EIIS Component Code SNUB), SA-CC-ll2-H-000, are Pacific Scientific model PSA-1/4-4, rated for 350 lbs.

each, or a total load of 700 lbs. for both. The design loading for the line to which the snubbers attach is 35 lbs.

It is likely reanalysis of the line loading, planned to be performed under the Snubber Reduction Program, will demonstrate that these snuhbers are not necessary.

The oversight apparently resulted from a clerical, or documentation error which did not properly identify the snubbers as safety related when the surveillance program was initiated. Since it was recognized that there was a potential for a discrepancy, a review of all snubber documentation has been included in the Snubber Service Life Program. All of the records for Unit 3 snubbers have been reviewed, with no other discrepancies identified.

A similar program is in progress for Unit 2.

The health and safety of plant personnel, and the public, was not affected by this event.

pKp_

(.13 f"' '

2

i:

p..

O' a[f Southem Califomia Edison Company SAN ONOFRE NUCLEAR GENERATING STATION P O. BOX 128 SAN CLEMENTE. CAUFORNIA 92672 H.E. MORGAN TELEPHONE erario= ua=4aE" February 9, 1987 l

[

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

20555 l

l

- Subject: Docket No. 50-362 30-Day Report Licensee Event Report No.87-001 San Onofre Nuclear Generating Station, Unit 3 Pursuant to 10 CFR 50.73(a)(2)(1), this submittal provides the required 30-day written Licensee Event Report (LER) involving the surveillance of two instrument line snubbers. Neither the health and safety of plant personnel nor the health and safety of the public was affected by this event.

If you require any additional information, please so advise.

Sincerely,

- IdF._ M

Enclosure:

LER No.87-001 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)

Y lu----------