ML18094A030

LER 1978-003-03 for Nine Mile Point Unit 1 Re Surveillance Test Found Main Steam High Flow Switch with Setpoint of 107.5 PSI

ML18094A030
Person / Time
Site:	Nine Mile Point
Issue date:	01/31/1978
From:	Niagara Mohawk Power Corp
To:	Office of Nuclear Reactor Regulation
References
LER 1978-003-03
Download: ML18094A030 (1)

Text

NBC FORM 366 U. S. NUCLEAR RLEQULATORY COEXIMIbblUN (7 77)

LICENSEE EV EIUT REPORT 3

RCONTROL +BOCK: Qi (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) 6

~DI 7 8 N 'Y, <>'N H P 1 14 Q2 15 0 0 - 0 0 0 LICENSE NUMBER 0 0 0 0Q34 25 26

] ]

LICENSE TYPE

] ]

30 QE~QE57 CAT 58 9 LICENSEE CODE CON'T Q70 1 1 3 7 8QB 01 3 1 7 8 QB 60 GB 69 EVENT DATE 74 75 REPORT DATE 80 61 DOCKET NUMBER EVENT DESCRIPTION AND PROBABLE CONSEQUENCES QIO

~o2 Durin stead state o eration survei1 lance test Nl -ISP-RE22 found a

~03 main steam hi h flow switch with a set oint of 107.5 psi. T.S. 3.6.2b

~o4 re uires a set oint of 105 si +/- 1.0 si. This condition resulted

~os in minimal safety ' lications. Three redundant instruments were

~DB available in the same channel ~

~OB 80 7 8 9 SYSTENI CAUSE CAUSE COMP. VALVE

~00',,

7 8

~18 9

CODE 10 Q11 CODE 11 E Q12 SUBCODE

~EQ13 12 13 I

COMPONENTCODE N S T R 0 QE 18 OCCURRENCE SUBCODE

~SQ>>

19 SUBCODE 20 I QIR.

REVISION SEQUENTIAL REPORT Q11 LEANDRO IIEIORT ACTION .FUTURE EVENT YEAR

~78 21 22 EFFECT

+

23 SHUTDOWN

~00 24 REPORT NO.

3 2G 27 28 ATTACHMENT CODE 29 NPRD 4 TYPE 30 31 PRIS'IE COMP.

32 COMPONENT TAKEN ACTION ON PlANT METHOD HOURS +22 SUBMITTED FORM SUB. SUPPLIER MANUFACTURER

~EQ>>~O>>

33 34

~ZO2o 35 LJO2 36 37 o o 40 LI 41 023 ~024 42

~NO25 43 44 B 0 8 0 47 tDB CAUSE DESCRIPTION AND CORRECTIVE ACTIONS 027 0 RE22G, a Barton Model 278 differential pressure flow indicating switch drifted from a setpoint of 105 ~ 7 psi. It was reset to 105.0 psi.

Current surveillance testing schedules are adequate to insure early detection of future instrument drifts.

8 9 80 FACILITY METHOD OF POWER OTHERSTATUS QBO DISCOVERY DISCOVERY DESCBIPTIOM Q32 STATUS 'AI 8 9 E QEE ~08 ROE>>A 10 12 13 44

~BQ3I 45 46 Surveil lance Testing 80 7

ACTIVITY CONTENT AELEASEO OF RELEASE AMOUNTOF ACTIVITYQB NA NA LOCATION OF AElEASE Q 6 ~Z Q33 ~ZQ34 7 8 9 10 44 45 80 PERSONNEL FXPOSUAES NUMBER TYPE DESCAII TION Q39

~57 8

~00 9

Oj~EO30 11 12 13 80 7

PERSONNEL INJURIES NUMBER DESCBIP TION'8 0 [0000JQER NA 7 8 9 11 12 80 LOSS OF OA DAMAGE TO FACILITY TYPE DESCRIPTION Q43 9 Z 02 NA 7 8 9 'Io 80 PUBLICITY NRC USE ONLY ISSUED DESCRIPTION QS LQQ44 NA 68 15-55-55~ o 8 9 10 G9 BO NAME OF PREPARER