ML112900745

LER 80-020/03L-0:on 800427,during post-maint Startup of Reactor Recirculation Sys,Inaccessible Recirculation Valve Motor Failed.Cause Not Stated.Motor Is Limitorque Type SMB-2 W/Magnetic Brake

ML112900745
Person / Time
Site:	Monticello
Issue date:	05/27/1980
From:	Shurts S Northern States Power Co
To:	NRC/OI/RGN-III/FO
Shared Package
ML112900746	List: ML112900745 ML19323G144
References
LER-80-020-03L, LER-80-20-3L, NUDOCS 8005300450
Download: ML112900745 (3)

Text

REGULATORY *ORMATION DISTRIBUTION SYd M (RIDS)

ACCESSION NBR:8005300450 DOC.DATE: 80/05/27 NOTARIZED: NO DOCKET #

FACIL:50-263 Monticello Nuclear Generating Plant, Northern States 05000263 AUTHNAME AUTHOR AFFILIATION SHURTSS.J. Northern States Power Co.

RECIPNAME RECIPIENT AFFILIATION Region 3, Chicago, Office of the Director

SUBJECT:

LER 80-020/03L-0:on 800427,during post-maint startup of reactor recirc sysfinaccessible recirc valve motor failed.

Cause not stated,Motor is Limitorque type SMS-2 w/magnetic brake, DISTRIBUTION CODE: A002S COPIES RECEIVED:LTR ENCL 2. SIZE:.J) ,L...

TITLE: Incident Reports NOTES: --------------

RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL ACTION: 05 aC 0? #3 4 4 INTERNAL: R9i 1I 1 02 NRC POR 1 1 2 2 11 MPA 3 3 15 NOVAK/KNIEL 1 1 16 EEB 1 t 17 AD FOR ENGR 1 1 18 PLANT SYS BR 1 1 19 I&C SYS BR 1 1 20 AD PLANT SYS 1 1 22 REAC SAFT BR 1 23 ENGR BR 1 1 24 KREGER 1 1 25 PWR SYS BR 1 1 26 AD/SITE ANAL 1 27 OPERA LIC BR 1 1 1

28 ACDENT ANLYS 1 29 AUX SYS BR 1 1 1

AD/ORP-DOR 1 AEO0 10 10 BERLINGERC, 3 3 DOUG MAY-TERA 1 1 HANAUER,3S, 1 1 JORDAN,E./IE 1 1 EXTERNAL: 03 LPDR 1 1 04 NSIC 1 1 29 ACRS 16 16 A' JUN 21980 TOTAL NUMBER OF COPIES REQUIRED: LTTR 60 ENCL 60

NORTHERN STATES POWER COMPANY MINNEAPOLIS. MINNESOTA 55401 May 27, 1980 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 Recirc Valve Motor Failure The Licensee Event Report for this occurrence is reproduced on the back of this letter. Enclosed are three copies.

This event is reported in compliance with Technical Specification Section 6.7.B.2.b. in that the condition led to operation in a degraded mode permitted by a limiting condition for operation (Section 3.5).

Yours very truly, O ayer, PE ger of Nuclear Support Services LOM/JAG/ak cc: Director, IE, USNRC (30)

&-Di ector, MIPC, USNRC (3)

MPCA Attn: J W Ferman

-over 8OO500

NIC FORM lu4b l. %. NUs:I I All III GI II AlA tIY coMMISION 1-71 LICENSEE EVLN I 'REPOH f CONTROL BLOCK: , (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) 6 lMINIMINIP111 0 101-10 101010 10 1 (OLOOI411 111111 0[

1 8 9 LICENSEE CODE 14 5 LICENSE NUMBER 75 26 LICENSE TYPE JO 57 CAT 58 CONT REPORT 0 510 0101216[3I ) l0j41 2l7l8 ID1 0 151217 18 10 7 8 60 61 DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES 10 2 During Post-Maintenance Startup of the Reactor Recirc System an inaccessible recirc I valve motor failed. A compatible replacement motor was removed from the Outboard "A" core spray containment isolation valve and installed on the recirc valve. At thel time of plant startup the "'A"Loop of Core Spray was therefore considered inoperable. I The redundant core spray loop and LPCI system were operable. No previous similar occurrences.

7 8 9 80 SYSTEM CAUSE CAUSE COMP. VALVE CODE CODE SUBCODE COMPONENT CODE SUBCODE SUBCODE 7 a L L.O 9 10 11 (x5 1zJ@ I IAILIV 10 IP 19 12 13 18 19 A 20 D

SEQUENTIAL OCCURRENCE REPORT REVISION LERO EVENTYEAR REPORT NO. CODE TYPE NO.

R L21 UoNUMBER.8 22 1--

23 10 12 10 24 26 Lj 27 28 13J1.29 LL 30 1--

31 L-i 32 ACTION FUTURE EFFECT SHUTDOWN ATTACHMENT NPRO-4 PRIME COMP. COMPONENT TAKEN ACTION ON PLANT METHOD HOURS SUBMITTED FORM bUB. SUPPLIER MANUFACTURER LJ@LzJ@ IL i@ 1zJ 33 34 35 36 10 10 10I I LNJ2 37 40 41 IN3J 42 LA 43 IL 12 10 101 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS Plant startup commenced based on the fact that a rej lacement motor was available and I TTJ could be installed in a matter of days. The motor Ls a Limitorque TYpe SMR-?, 460 VAll 1 with magnetic brake.

I 11 1

7 8 9 80 FACILITY METHOD OF STATUS  % POWER OTHER STATUS DISCOVERY DISCOVERY DESCRIPTION G2 EU 7 8 LG j@ 10 9 10 l0 10 l1 NA 12 IT 44 IZll 45 46 NA ACTIVITY CONTENT RELEASED OF RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE &

I,I L z IZNl IN NA so 80 I0 7 8 9 10 11 44 45 PERSONNEL FXPOSURES I NUMRER TYPE oflSCRIPTION 1I1 InIn 1 LJizl 7 8 9 11 12 13 MA I

I 80 PERSONNEL INJURIES NUMBER DESCRIPTION ET110 10 0 1 NA 7 8 9 I 12 80 LOSS OF OR DAMAGE TO FACILITY TYPE DESCRIPTION I79 I INA 7 8 9 10 80 PUBLICITY ISSUED DESCRIPTION NRC USE ONLY

[ LB NRI[ N^A a 9 10 66 69 so 3~~5O0 0hrt NAME OF PREPARER Shurts

.E 612/295-5151 0