05000280/LER-1981-008-03, /03L-0:on 810410,process Vent Radiation Monitor Found Inoperable.Caused by Broken Pump Drive Belt Due to Misalignment.Drive Belt Replaced & Radiation Monitor Operability Verified

/03L-0:on 810410,process Vent Radiation Monitor Found Inoperable.Caused by Broken Pump Drive Belt Due to Misalignment.Drive Belt Replaced & Radiation Monitor Operability Verified

ML18139B309
Person / Time
Site:	Surry
Issue date:	05/08/1981
From:	Joshua Wilson VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML18139B307	List: 05000280/LER-1981-008-03, /03L-0:on 810410,process Vent Radiation Monitor Found Inoperable.Caused by Broken Pump Drive Belt Due to Misalignment.Drive Belt Replaced & Radiation Monitor Operability Verified 05000280/LER-1981-025-03, /03L-0:on 810414,penetrant Test PT-27B Showed Low Amp Readings for Heat Tracing Panels 10 & 11,circuit 6A. Caused by Excessive Heat.Design Change Initiated ML18139B306
References
LER-81-008-03L, LER-81-8-3L, NUDOCS 8105150296
Download: ML18139B309 (2)

LER-1981-008, /03L-0:on 810410,process Vent Radiation Monitor Found Inoperable.Caused by Broken Pump Drive Belt Due to Misalignment.Drive Belt Replaced & Radiation Monitor Operability Verified

Event date:
Report date:
2801981008R03 - NRC Website

text

,.

~.

J

(

LICENSEE EVENT REPORT CONTROL. SL.OCK: U-LLau 0 (PLEASE PRINT OR TY-1. REOUIREO INFORMATION!

1 6

IV I A I s ! pl s I 1 101 0 I O I -I O I 01 01 01 01 *-1 Ol O 1014 11 j l 1111101 I I© 9

LICENSE: CODE 14

s LICENSE NUMBER

?S 26 LICENSE TYPE JO S7 C.:.7 58

~~~~~ Li© I o l s l o I o J o I 21 s I o 101 ° l 4 I 1 I O I 8 l 1 I© I o I s I o I a l s I 1 I© 60 61 OOCKET NUMBER 68 69 EVEN7 O.

.TE 74 75 REPOR":'" CATE BO EVENT DESCr!IPTlON AND PR06AS1..E CONSEQUENCES@

I On April 1-0,1981, the Process Vent radiation monitor was found inoperable due tn a CIII]

ITTIJ [ill]

broken pump drive belt.

A temporary repair to the failed belt was made, Approxirnateiy sixteen hours later, the drive belt failed again.

This is contrary to T.S.-3.11.B.5.l-b and is reportable per T.S-6.6.2.b(4).

An independent H.P. accountability sampler verified that the normal release from the Process Vent system was within Tech. Spec.

[ill]

ill:[]

limits.

Therefore, the health and safety of the public were not affected.

e 9 SYSTEM

CAUSE

CAUSE COOE COOE SUBCOOE COMPONENT CODE

~

jM 1c I@.l:j@ l!_J@ jPjU!MIPlxjxl@

8 9

10 11 12 13 18 SEQUENTIAL OCCURRENCE REPORT NO.

COOE I I I o *1 o I s I 1

......-I I o 13 I 23 24 26 27 2S 29 C\\ LER/RO CVENTYEAR

'O REPORT j 8 l 1 I NUMBE!'I

Zl 22 COMP.

SUBCOOE l.l!J@)

19 REPORT TYPE LlJ 30 VALVE SUBCOOE lLJ@

20 l.=.l 31 REVISION NO.

lJU 3:

so TAK.EN ACTION ON PL.ANT METHOO HOURS Z2 SUBMITTED FORM SUB.

• SUPPLIER AC.ION FU"i\\.JRE EFFE~

- SMUTOOWN

~

ATiACHMENT NPRQ.4 PRIME COMP.

~@~@ l2.J ~

!,O j O ! O !

• I L!J@)-

L2!.l-W COMPONENT MANUFACTVRER 33 34 35 36 37 40 41 42 43

- 1 V I 1 I 1 I 5 I@

CAUSE DESCRIPTION AND CORRECTIVE ACTIONS @

lJ))J J The exact cause cannot be determined, however, misalignment is Suspected_

Ea] Jawing CIII]

the second event, the dr_ive belt was replaced with a new belt and thl:! Rad1atinn Monitor verified operable.

!III!

OJI]

tIEl a 9 FACILITY STATUS

% POWER t:mJ ~@ IO I O IO lI 8

9 10 12 13 OTHER STATUS @

S/G Replacement ACTIVITY CONTENT

~

44 RELEASED OF RELEASE AMOUNT OF ACTIVITY ~

[!]TI w @) LUL...' __

...;;.N..:../=A ____

7 a s 10 11 PERSONNEL EXPOSURES t.:::\\

METHOD OF OISCOVERY

~~!Operational 45 46 N/A OISCOVERY t>ESCRIP'TION @

Event

_LOCATION OF REI.EASE @

47 BO 80 60 NUMBER t::;\\ TYPE i;;\\ OESCRIPTION [ill] I O I O I O 1'8~~..__ _____.;.;.N.:..;/A~---------------------

a s 12 1:.

80 PERSONNEi. INJURIES D,.

NUMBER OESCRl"ION6 [Ilij j O l O I O l@'---------=N~A~----------------~

a s 1,

12 I

eo LOSS OF OR OAMAGE TO FACILITY~

'TYPE OESCRIPTION i.::;:I DJij lfj{§)L---*--------~N~A~-------------------i a 9 10 PUBLICITY

~

NF!C us- 0 v

1SSUE0t,;:;\\ OESCRIP'TION ~

e, NL' rrm we,..__ _________

_....N..i....., __________

11,, 11,,,,, 1, !

a

!ii 10

&S n ao ;

7 ao (804} 357-3184

~

---

~---~*-*--

• J.. *

\\

e ATTACHMENT i SURRY POw'ER DOCKET NO:

STATION, UNIT 1 50-280 81-008/03L-O 04-10-81 REPORT NO:

EVENT DATE:

TITLE OF EVENT:

RADIATION MONITOU (Gw~lOl/102) PUNP FAILURE

1.

DESCRIPTION OF EVENT

On April 10, 1981, the Process Vent radiation moni'tor, RM-GW-101/102, was f_ound inoperable due to a broken pump drive belt.

Due to a lack of readily available drive belts, a temporary repair to the failed belt was made.

.Approximately sixteen hours later, the drive belt failed again, This is contrary to Technical Speciti~ation 3.11.B,5.b and is reportable per Technical Specification 6*:6, 2. b(4).

2.

PROBABLE CONSEQUENCES.AND STATUS OF REDUNDANT SYSTEMS:

The Process Vent System is monitored by RM-GW~lOl, 102 and the Health Physics accountability sampler.

The H.P. accountability sampler provides cumulative samples.

The HP accountability sample," that was analyzed :ifter this occurrence, indicated that the releases made during the event were within allowable Tech. Spec. limits.

Therefore, the health and safety of the public were not affected.

3.

CAUSE

The exact cause cannot be determined, however, misalignment is suspected.

4.

IMMEDIATE CORRECTIVE ACTION

For both events, the immediate corrective action was to carry out the actions setforth in abnormal procedure No, 5.16, e.g. input source isolation,

5.

SUBSEQL'ENT CORRECTIVE ACTION:

Following the second event, the drive belt was replaced with a new belt and the Radiation Monitor verified operable.

6.

ACTION TAKEN TO PREVENT RECURRENCE:

Since craft personnel are already aware of the consequences of misalignment, no additional action is deemed necessary.

• 7.

GENERIC IMPLICATIONS:

This appears to be an isolated event, therefore not generic,