05000263/LER-1979-003-01, /01T-0 on 790301:containment Vent & Purge Isolation Valves Would Not Close During DBA-LOCA.Cause Unknown.Fisher Continential 18 & 20 Inch,Type 9220 Butterfly Valves Opening Is Administratively Controlled

/01T-0 on 790301:containment Vent & Purge Isolation Valves Would Not Close During DBA-LOCA.Cause Unknown.Fisher Continential 18 & 20 Inch,Type 9220 Butterfly Valves Opening Is Administratively Controlled

ML112780151
Person / Time
Site:	Monticello
Issue date:	03/15/1979
From:	Goranson R Northern States Power Co
To:	NRC/OI/RGN-III/FO
Shared Package
ML112780152	List: 05000263/LER-1979-003, Forwards LER 79-003/01T-0 05000263/LER-1979-003-01, /01T-0 on 790301:containment Vent & Purge Isolation Valves Would Not Close During DBA-LOCA.Cause Unknown.Fisher Continential 18 & 20 Inch,Type 9220 Butterfly Valves Opening Is Administratively Controlled
References
LER-79-003-01T, LER-79-3-1T, NUDOCS 7903200408
Download: ML112780151 (3)

LER-1979-003, /01T-0 on 790301:containment Vent & Purge Isolation Valves Would Not Close During DBA-LOCA.Cause Unknown.Fisher Continential 18 & 20 Inch,Type 9220 Butterfly Valves Opening Is Administratively Controlled

Event date:
Report date:
2631979003R01 - NRC Website

text

REGATORY INFORMATION DISTRIB@ON SYSTEM (RIDS)

ACCESSION N8R37903200408 DOC.DATE: 79/03/15 NOTARIZED: NO FACIL:50*263 MONTICELLO NUCLEAR GENERATING PLANT, NORTHERN STATES AUTH.NAME AUTHOR AFFILIATION GORANSONR.

NORTHERN STATES POWER CO.

RECIPONAME RECIPIENT AFFILIATION REGION 3, CHICAGO, OFFICE OF THE DIRECTOR DOCKET #

05000263 SUBJECT$

LER 79*003/01T0 ON 790301:CONTAINMENT VENT & PURGE ISOLATION VALVES WOULD NOT CLOSE DURING DBA-LOCA.CAUSEI UNKNOWNFISHER CONTINENTIAL 18 & 20 INCH,150#rTYPE 29220 BUTTERFLY VALVES OPENING ADMINISTRATIVELY CONTROLLED.

DISTRIBUTION CODE: A0028 COPIES RECEIVED:LTR ENCL.J SIZEI TITLE: INCIDENT REPORTS NOTES:

RECIPIENT ID CODE/NAME:

ACTION:

05 BC 6"

+ 3 INTERNAL REG FILE; 14 TA/,EDO 16 EEB 18 PLANT SYS BR 20 AD PLANT SYS 22 REAC SAFT BR 24 KREGER 26 AD/,SITE ANAL 28 ACDENT ANLYS E JORDAN/IE' COPIES LTTR ENCL 4

4 1

1 1

1 1

1 1

1 RECIPIENT ID CODE/.NAME 02 11 15 17 19 21 23 25 27 29 NRC POR MPA NOVAK/,KNIEL, AD FOR ENGR I&C SYS BR AD SYS/PROJ ENGR BR PWR SYS BR OPERA LIC BR AUX SYS BR COPIES LTTR ENCL 1

1 1

1 1

1 1

1 1

1 1

1 1

1 1

1 EXTERNALI 03 LPOR 29 ACRS 1

16 1

16 04 NSIC 1

1 jaw

, i~

404, TOTAL NUMBER OF COPIES REQUIRED: LTTR 46 ENCL' 46

NORTHERN STATES POWER COMPANY MINNEAPOLIS, MINNESOTA 55401 March 15, 1979 Mr J G Keppler Office of Inspection & Enforcement U S Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, IL 60137

Dear Mr Keppler:

MONTICELLO NUCLEAR GENERATING PLANT Docket No. 50-263 License No. DPR-22 Vent Isolation Valve Design Problem The Licensee Event Report for this occurrence is reproduced on the back of this letter. Enclosed are three copies.

This event is reported in accordance with Technical Specification 6.7.B.l.i in that components were found which may perform in a less con servative manner than that assumed in safety analyses.

Yours very truly, L 0 Mayer, PE Manager of Nuclear Support Services LOM/DMM/deh cc:

Director, IE, USNRC (40)

Director, MIPC, USNRC (3)

MPCA Attn:

J W Ferman

- over-

? 9 03200q @-o V\\

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8 CON'T 7

8 0O4 78 7

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SYSTEM

CAUSE

CAUSE COMP.

VALVE CODE CODE SUBCODE COMPONENT CODE SUBCODE SUBCODE ISI DI (3J 1L (3 1Zj I VI Al LI VI El XI3 LI0( w G

9 10 11 12 13 18 19 20 SEQUENTIAL OCCURRENCE REPORT REVISION LER RO EVENT YEAR REPORT NO.

CODE TYPE NO.

S 21 22 23 24 26 27 32 29 30 31 32 ACTION FUTURE EPPECT SHOT DOWN ATTACHMENT NPR 4 PRIMECOW.

COMPONENT TAKEN ACTION ON PLANT METHOD HOURlS

2)

SUMTTED FORM SU SUPPLIER MANUFACTURER LJ@Ll@ LO@7 LzJ(D 1o Iloo I L@

Ll@

LLJ(121 33 34 35 36 37 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS In l

%fl*r*ICTNO rA I CAUSE OF OCCURRENCE IS UNKNOWN. AT THI S

I TYPE 9220 BUTTERFLY VALVES.

OPENING I CLOSURE UNDER ACCIDENT CONDITIONS.

I WITH THE MANUFACTURER.

7 8

9 FSATLSY

%POWER OTHER STATUS E J(

1 l 0 1 0 @lNA 7

8 9

10 12 11 44 ACTIVITY CONTENT RELEASED OF HELEASE AMOUNT or ACTIVITY EE ziB LzJ(l NA 7

8 9

10 11 44 PERSONNEL EXPOSURES NUMBER TYPr DESCRI'TION

[ I 01 01 o L

I NA 7

8 9

11 12 13 PERSONNEL INJURIES NUMR" DESCI P T10 N 8

[

I al1 018I NA 1

8 9

11 12 I O'S OF OR DAMAGE TO FACILITY TYPE

DESCRIPTION

E[ELzJ@I NA 1

8 9 10 PUII TY P

ziI SLZO81 NA

/

I 9

10 NAME OF PREPAREH S TIME, FISHER CONTINENT IAL 1.8 q20 LINCHf 1.U5tt OF VALVE ADMINISTRATIVELY CONTROLLED TO ASSURF I NVESTIGATION IS CONTINUING IN CONJUNCTION METHOD OF DISCOVERY DISCOVERY DESCRIPTION L[ OI NOTIFICATION BY NRC 45 46 80 I NA 4I 80 LOCAT ION OF RELEASE 80 so N3C LSE ONLY 6.8 69 80 0

IONE (612) 295-5151 19,?0320T lo0g NOW I Oil

(/.7/)

I J. !;. Ni J(:I I All III Gt JA Al ()It Y CO(MMVIUIN INTERIM REPORT LICENSEE EVI NI HLPOiH I cONII 0 K

LOCK.

I (D

(PLEASE PRINT Oil TYPE ALL REQUIRED INFORMATION)

IMINI MINI P1 1 01 olo1 l0l 00lo0ol-l0.0lol 411 1l111 I(L_"

G5) 9 LICENSEE CODE 14 15 LICENSE NUMBL 25 26 LICENSE TYPE 30 57 CAT 58 RUORE I 1

01 5101_0 10121 61 691 0 13 10111 7 19 10 1 13 111R 5A 7 9 60 61 DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE so EVENT DESCRIPTION AND PROBABLE CONSEQUENCES l WHILE AT STEADY STATE POWER, NRC NOTIFIED NSP THAT CONTAINMENT VENT AND PURGE IISOLATION VALVES WOULD POSSIBLY NOT CLOSE DURING DBA-LOCA. VERBAL CONFIRMATION I

I THAT VALVES WILL NOT CLOSE RECEIVED FROM VALVE MANUFACTURER, REPORTABLE UNDER I

I TECHNICAL SPECIFICATION 6.7.B.1.i. NO PREVIOUS SIMILAR OCCURRENCES. NO AFFECT l

I ON THE PUBLIC HEALTH AND SAFETY, 80 I

80 45 80