ML17340B419

LER 80-011/03L-0:on 800305,while Conducting Steam Line Area Temp Switch Calibr Surveillance,Temp Switch TS 3-261-17B Tripped Above Tech Specs.Caused by Dirt Deposits on Switch Actuation Plunger.Switch Cleaned,Adjusted & Tested

ML17340B419
Person / Time
Site:	Dresden
Issue date:	03/28/1980
From:	Sperroff R COMMONWEALTH EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML17340B418	List: ML17340B417 ML17340B419
References
LER-80-011-03L-02, LER-80-11-3L-2, NUDOCS 8004080561
Download: ML17340B419 (1)

Text

N ftc FOR'55"366 U; ~ UCLEAR REGULATORY COMMISSION I7 77)~

5 LICENSEE EVENT REPORT CONTROL BLOCIC: Qi (PLEASE PRINT OR TYPE ALI. REQUIRED INFORMATION) 6 7 8 9 I L D R S I.ICENSEE CODE 3

14 Q2 IS 0 0 0 0 0 0 0 0 0 25 Q3 26 4 1 1 LICENSE TYPE 1 1 00 Q4~ 57 CAT 58 Q8 CON'T

~LLQs 0 5 0 0 0 2 4 9 68 7

69 0 3 0 EVENT OATF 5 8 0 74 s

75 0 3 2 8 REPORT DATE 8 0 80 Qe 7 8 60 61 DOCKET NUMBER EVENT DESCRIPTION ANO PROBABLE CONSEQUENCES QIO

~02 During Unit 3 shutdown, while conducting steam line area temperature switch calibration

~03 surveillance, temp. switch TS 3-261-17B tripped at 203.1 deg. F. Tech. Spec. Table 3.2.1 requirement is g /= 200 degrees F. This is of minimum safety significance be-

~OS cause even with 1 switch not functioning correctly, all four trip channels were oper-

~06 able. This is the first occurrence for this type of switch.

~os 80 7 . 8 SYSTEM CAUSE CAUSE COMP. VALVE CODE CODE SUBCQDE COMPONENT CODE SUBCOQE SUBCODE

~oe ~CZ QII ~E QI2 ~A QI3 I II S Z R 0 QI4 ~S Q15 ~Z Q15 7 8 9 10 11 12 13 18 '19 20 SEQUENTIAL OCCURRENCE REPORT REVISION Q17 LF RIRO 557087 ACTION FUTURE EVENT YEAR

~80 21 22 EFFECT "

~

23 SHUTDOWN

~01 24 REPORT No.

1 26

~W 27

~03 28 ATTACHMENT CODE 29 NPROM TYPE

~L 30 PRIME COMP.

31 No.

~0 32 COMPONENT TAKEN ACTION ON PLANT METHOD HOURS +22 SUBMITTED FORM SUB. SUPPLIER MANUFACTURER QIB ~XG9 ~ZQ20 ~ZQ21 ~N Q23 ~~Q24 ~N Q25 33 34 35 36 37 40 41 42 43 44 47 CAUSE OESCRIPTION ANO CORRECTIVE ACTIONS Q27 0 Event was caused by dirt deposits on the switc!'I actuation plunger. Switch was adjusted to trip at 181.6 deg, F. increasing and verified for repeated operability. Switch mechanism was also cleaned and exercised. All steam line area temperature switches 3

shall continue to be tested during each refueling outage.

4 7 8 9 80 5

F AC I LITY STATUS Q28 ~00

.C POWER 0 Q29 OTHER STATUS E/A

~

~

~30 METHOD OF DISCOVERY

~BQ31 Surveillance DISCOVERY DESCRIPTION Q32 7 8 9 10 12 'IS 44 45 80 ACTIVITY CONTENT RELEASED QF RELEASE AMOUNT OF ACTIVITY Q N/A LOCATION OF RELEASC Q

~16 Z Q33 ~ZQ34 N/A 7 8 9 10 11 44 45 80 PERSONNEL EXPOSURES NUMBER TYP'E DESCRIPTION Q39

~l7 ~00 0 O!7 Z Q38 N/A 80 7 8 9 11 12 13 PERSONNEL INJURIES NUMBER OESCRIPTIONQ41

~OO O Q49 N/A 7 8 9 11 12 80 I.QSS QF QR DAMAGE TO FACILITY 43 TYPE OCSCRIPTION 8 0 0 4I 0 8 Op< I

[119] Z Q42 N/A 8 9 10 80 O

ISSUCD PUBLICITY DESCRIPTION ~ NRC USE ONLY 44 7

9 10 68 69 80 ~ 45 Randy. Speroff X-526 0