05000293/LER-1980-046-03, /03L-0:on 800802,during Reactor Shutdown,High Water Level Isolation Main Steam Line Drain Valve MD-220-1 Failed to Isolate.Caused by Incorrect Setpoint on Yarway Level Switch.Switch Adjusted & Recalibr

/03L-0:on 800802,during Reactor Shutdown,High Water Level Isolation Main Steam Line Drain Valve MD-220-1 Failed to Isolate.Caused by Incorrect Setpoint on Yarway Level Switch.Switch Adjusted & Recalibr

ML19331D711
Person / Time
Site:	Pilgrim
Issue date:	08/29/1980
From:	Whitney G BOSTON EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19331D703	List: 05000293/LER-1980-046, Forwards LER 80-046/03L-0 05000293/LER-1980-046-03, /03L-0:on 800802,during Reactor Shutdown,High Water Level Isolation Main Steam Line Drain Valve MD-220-1 Failed to Isolate.Caused by Incorrect Setpoint on Yarway Level Switch.Switch Adjusted & Recalibr
References
LER-80-046-03L, LER-80-46-3L, NUDOCS 8009030483
Download: ML19331D711 (1)

LER-1980-046, /03L-0:on 800802,during Reactor Shutdown,High Water Level Isolation Main Steam Line Drain Valve MD-220-1 Failed to Isolate.Caused by Incorrect Setpoint on Yarway Level Switch.Switch Adjusted & Recalibr

Event date:
Report date:
2931980046R03 - NRC Website

text

,uwuan (7 77)

LICENSEE EVENT REPORT CONTROL BLOCK: I l

l l

l l

lh (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) 6 jo ltl l Ml Aj P l P j S l 1 l@l 0 l 0 l - l 0 l 0 l 0 l 0 l 0 l-l 0 l 0 [@l 4 l 1 l 1 l1 l 1 l@l l

lg 7

8 9 LICENSEE CODE 14 15 LICENSE NUMBER 25 26 LICENSE TYPE JO

$7 CAT 58 CON'T 10111 S$n"Cs l L l@l 0 l 5 l 0 l - l 0 l 2 l 9 l 3 l@l 0 l 810 l 2 l 8 l 0 l@l 0 l 8 l 2 l 918 l 0 l@

7 8

60 61 DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE 80

)

EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h i

1012 l l At 2330 on August 2, 1980 the high water level isolation main steam line drain valve j i o i3, l (M0-220-1) did not isolate. Reactor was in shutdown at this time. The I&C lab l

o ;4; j was asked to investigate.

l 101 s 1 I l

10161 l l

10171 l i

1018 I I I

80 7

8 9 E

CODE S SC E COMPONENT CODE SU8 CODE SU E

lTT91

'l sl Dl@ W@ lB l@ l Il Nl Sl Tl Rl Ul@ W@ l Zl@

7 8

9 to 11 12 13 18 19 20 SEOUSNTIAL OCCURRENCE REPORT REVISION LER EVENT YEAR REPCRT NO.

CODE TYPE N O.

@ yug/RO l8 l0 l l-l l0 14 l6 l d

l 0l 31 lLl

[---J l0 l aE 21 22 23 24 26 27 28 29 30 31 32 K N ACTO ON PL NT M

HOURS 22 SS I FOR 8.

SUPPLIE MA FACTURER l E lgl34El@

lZl@

l Z l@

l0 l0 l0 l0 l lN l@

lN ]@

lN l@

lYl0l1l0l@

33 JS 36 31 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS 27 IiiOI l Investigation revealed a setpoint on a Yarway level switch was not correct.

Re-l

i ;il l calibration and adjustment of the Yarway was conducted.

l 11 121 l l

I L1.12] I 11 14 I i 1

80 7

8 9 STA S

% POWER OTHER STATUS dis O RY DISCOVERY DESCRIPTION I115 l l G I@ l 0 l 0 l 0 l@l N.A.

l l A l@l Operational event l

A TlVITY CO TENT RELEASEO OF RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE N.A.

l l

N.A.

l

, 11 l6 l W @ l Z l@l PERSONNEL EXPOS ES TYPE @l DESCRIPTION NUM8ER 11 17 l l 0 l 0 l 0 l@l l

N.A.

l 4

PERSONNE L INJURIES NUMBER

DESCRIPTION

N.A.

]

l2 l 8 l l 0 l 0 l 0 l@l 7

8 9 11 12 80 LOSS OF 1R OAMAGE TO FACILITY TYPE

DESCRIPTION

N.A.

l

] @l 1 9 80 7

8 9 10

~80 0 9 0 3 04 K_3 NRC USE ONLY l

N.A.

l lllllllllllllf ISSUF @OE CRsPTION 2 0 68 69 80.

7 8 9 to NAME OF PREPARER PHONE: