05000249/LER-1980-011-03, /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

/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: 05000249/LER-1980-011-03, /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
References
LER-80-011-03L-02, LER-80-11-3L-2, NUDOCS 8004080561
Download: ML17340B419 (1)

LER-1980-011, /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

Event date:
Report date:
2491980011R03 - NRC Website

text

Nftc FOR'55"366 I7 77)~

5 LICENSEE EVENT REPORT U; ~

UCLEAR REGULATORY COMMISSION 7

8 CON'T 7

8

~02 CONTROL BLOCIC:

I L

D R

S 3

Q2 0

9 I.ICENSEE CODE 14 IS Qi (PLEASE PRINT OR TYPE ALI. REQUIRED INFORMATION) 6 0

0 0

0 0

0 0

0 Q3 4

1 1

1 1 Q4~

Q8 25 26 LICENSE TYPE 00 57 CAT 58

~LLQs 0

5 0

0 0

2 4

9 7

0 3

0 5

8 0

s 0

3 2

8 8

0 Qe 60 61 DOCKET NUMBER 68 69 EVENT OATF 74 75 REPORT DATE 80 EVENT DESCRIPTION ANO PROBABLE CONSEQUENCES QIO 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

~06

cause

even with 1 switch not functioning correctly, all four trip channels were oper-able.

This is the first occurrence for this type of switch.

~os 80 7

8

~oe 7

8 SYSTEM

CAUSE

CAUSE COMP.

VALVE CODE CODE SUBCQDE COMPONENT CODE SUBCOQE SUBCODE

~CZ QII

~E QI2

~A QI3 I

II S

Z R

0 QI4

~S Q15

~Z Q15 9

10 11 12 13 18

'19 20 SEQUENTIAL OCCURRENCE REPORT REVISION LF RIRO EVENT YEAR REPORT No.

CODE TYPE No.

Q17 557087

~80

~

~01 1

~W

~03

~L

~0 21 22 23 24 26 27 28 29 30 31 32 ACTION FUTURE EFFECT SHUTDOWN ATTACHMENT NPROM PRIME COMP.

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.

~

~30 METHOD OF OTHER STATUS ~

DISCOVERY

~BQ31 45 45 7

8 9

11 12 I.QSS QF QR DAMAGE TO FACILITY 43 TYPE OCSCRIPTION Z

Q42 N/A 9

10 PUBLICITY ISSUCD DESCRIPTION~

9 10 [119]

8 O

Randy. Speroff 4

7 8

9 FACILITY STATUS

.C POWER 5

Q28

~00 0

Q29 E/A 7

8 9

10 12

'IS 44 ACTIVITY CONTENT RELEASED QF RELEASE AMOUNTOF ACTIVITYQ

~16 Z

Q33

~ZQ34 N/A 7

8 9

10 11 44 PERSONNEL EXPOSURES NUMBER TYP'E DESCRIPTION Q39

~l7 ~00 0

O!7 Z

Q38 N/A 7

8 9

11 12 13 PERSONNEL INJURIES NUMBER OESCRIPTIONQ41

~OO O

Q49 N/A 80 N/A LOCATION OF RELEASC Q 80 80 80 80 8 0 0 4I 0 8 Op< I 80 NRC USE ONLY 44 7

80 ~ 45 0

68 69 X-526 DISCOVERY DESCRIPTION Q32 Surveillance