05000280/LER-2076-009, Re Non-Operable MOV-2862B When Cycled by Console Control Switch
| ML19105A156 | |
| Person / Time | |
|---|---|
| Site: | Surry  |
| Issue date: | 07/13/1976 |
| From: | Stallings C Virginia Electric & Power Co (VEPCO) |
| To: | Moseley N NRC/RGN-II |
| References | |
| Serial No. 120 LER 1976-009-00 | |
| Download: ML19105A156 (3) | |
| Event date: | |
|---|---|
| Report date: | |
| 2802076009R00 - NRC Website | |
text
VIRGINIA ELECTRIC.A.ND POWER COMPANY RIOHMOND, VIRGINIA 23261 July 13," 1976, Mr. Norman c. Moseley, Director Office of Inspection and Enforcement u. s. Nuclear Regulatory Corrnnission Region II - Suite 818 230 Peachtree Street, Northwest Atlanta, Georgia 30303
Dear Mr. Moseley:
Serial No. 120 PO&M./ ALH: j lf Docket No. 50-281 License No.DPR-37 Pursuant to Surry Power Station Technical Specification 6.6.2, the Virginia Electric and Power Company hereby submits a copy of Reportable Occur-rence No. USRE-S2-76-09.
The substance of this report has been reviewed by the Station Nuclear
.Safety and Operating Corrnnittee and will be placed on the agenda for the next meeting of the System Nuclear Safety and Operating Corrnnittee.
'Enclosure Very truly yours,
'ZP-)J;.~~
c. M. Stallings Vice President-Power Supply and Production Operations cc:
Mr. Robert w. Reid, Chief (40 copies)
Operating Reactors Branch 4
jCENSEE EVENT CONTROL BLOCK: i....1 __,_____.!_._I __.__I ___._I___.!
REPORT e LICENSEE NAME 1
6 LICENSE NUMBER (PLEASE PRINT ALL REQUIRED INFORMATION]
LICENSE TYPE EVENT TYPE
@El I vi A I s I P I s I 2 I I olo I-lo Io Io Io I ol-loJQJ 1411 ii 11 lol I o I 3 I 7
8 9 14 15 25 26 30 31 32 CATEGORY
@ill coN'T I MI rl 7
8 57 58 REPORT TYPE w 59
EVENT DESCRIPTION
REPORT SOURCE w
60 DOCKET NUMBER EVENT DATE REPORT DATE I o I s Io 1-1 o! 2 I 8 I 1 I I o I 6 I 1 Is I 116 I lo!1lol6!1l6I 61 68 69 74 75 80
@lg] I With Unit Two at full rated power, it was observed that MOV-2862B would not operate 7
8 9 80
@@] I when cycled by the console control switch. Previously.. the valve operator __ had. performed!
7 8 9 80 jal41 I satisfactorily when operated in accordance with Electrical Test Procedure (ETP-5). The!
7 8 9 80 10151 I failure to operate by control swi_tch was evaluated as resulting from actuation of the J 7
8 9 80 lillJ LI _t::h~e=-rm:!:.!!!.a~l ~ov.!:!:e-=-r-=l~o~a~d::::sc......:i:.!.n~t==h~e::.....!:b~r:..::e::..!a:.!k~e=-=r:......!h~o~u~s;:..1.~* n~g.!......... M~OV.L.::-=-2~8~6-=2£lAs.s,_..!,t~h.se~ra..se~d:J,uun.!,.ld.uaa..1n~t.,_v:.wa.. l,1,..v~e...._J...
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..... Q,..N.... T~)I 7
8 9 PRIME 80 SYSTEM CODE
@0 Is IF I 7
8 9 10
CAUSE
CODE Lu 11 CAUSE DESCRIPTION COMPONENT CODE I v!A !1 !viol P]
12 17 COMPONENT SUPPLIER uJ 43 COMPONENT MANUFACTURER I 1 I 21 ol o I 44 47 VIOLATION w
48
~
jThe cause of this 7
8 9 event was the proper operation of the thermal overloads due to mech-I 80
~
lanical binding of the valve plug thus stopping the valve.
7 8 9 IT:@! !screws (MOV-2862B) were loosened relieving the tension on 7
8 9 FACILITY The three-point adjustment I 80 the valve plug. (Continued) 'I 80 STATUS
% POWER EE]
w LLI o Io I OTHER STATUS N/A METHOD OF DISCOVERY w
DISCOVERY DESCRIPTION Electrical Test Procedure 7
8 9
10 12 13 44 45 46 80 FORM OF ACTIVITY CONTENT RELEASED OF RELEASE AMOUNT OF ACTIVITY rn w lzJ I N/A LOCATION OF RELEASE
- 7.
8 9
10 11 44 45 80 PERSONNEL EXPOSURES NUMBER TYPE
DESCRIPTION
[IeJ jo lolol u N/A 7
8 9 11 12 13 80 PERSONNEL INJURIES NUMBER
DESCRIPTION
(ili lg_ I O ! 0 I L------=.:.N.t...::./ A.=__..; _______
....;__ _____________ ~
7 a 9 11 12 80 OFFSITE CONSEQUENCES
- - u]j N/A 7
8 9 80 LOSS OR DAMAGE TO FACILITY TYPE
DESCRIPTION
~ ~ L...::N~/~A~~~~~~~~~~~~~~~~~~~~~~~~~~~~----;:;-;:
7 8 9 10 80 PUBLICITY EE]
N/A 7
8 9 ADDITIONAL FACTORS
~ I The health and safety of the general public were not affected by this occurrence.
7 8 9
_J 80 80 E@ I There were no adverse safety implications, since the redundant valve (MOV-2862A) (cont!)
7 8 9 80 NAME: T. L. Baucom PHONE: (804) 357-3184 GPO 8 81
- 6 6 7
Pl e
EVENT DESCRIPTION (CONTINUED)
Low Head Safety Injection Pump suction path was cycled innnediately and proven operable.
MOV-2862B was operated manually.
This condition is reportable per Technical Specification (T.S.6.6.2B[3]).
Prior to initiating maintenance on MOV-2862B the redundant valve (MOV-2862A) was tested for operability (T.S.3.3B[4]).
(USRE-S2-76-09).
CAUSE DESCRIPTION (CONTINUED)
This removed the mechanical binding and permitted the motor operator to run at acceptable cur'rent resulting in normal operation.
Long term corrective action will be to inspect both valve internals at the next cold shutdown.
Since MOV-2862A and MOV-2862B are new valves this is a "first time" failure.
Since MOV-2862A was determined operable, efforts were devoted to grooming of MOV-2862B.
The redundant valve (MOV-2862A) has been similarly adjusted to assure _operability.
ADDITIONAL FAG~ (CONTINUED) was operable thereby assuring a source of borated water to the Low Head Safety Injection System if necessary.
Also if necessary the valves could have been manually isolated.