05000259/LER-1981-001-03, /03L-0:on 810105,core Spray Sparger to Reactor Pressure Vessel D/P Switch 1-PDIS-75-28 Found Set Above Tech Spec Limit.Caused by Barton Model 288 Setpoint Drift.Switch Replaced W/New Switch on 810115

/03L-0:on 810105,core Spray Sparger to Reactor Pressure Vessel D/P Switch 1-PDIS-75-28 Found Set Above Tech Spec Limit.Caused by Barton Model 288 Setpoint Drift.Switch Replaced W/New Switch on 810115

ML20003A358
Person / Time
Site:	Browns Ferry
Issue date:	01/28/1981
From:	TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20003A355	List: 05000259/LER-1981-001, Forwards LER 81-001/03L-0 05000259/LER-1981-001-03, /03L-0:on 810105,core Spray Sparger to Reactor Pressure Vessel D/P Switch 1-PDIS-75-28 Found Set Above Tech Spec Limit.Caused by Barton Model 288 Setpoint Drift.Switch Replaced W/New Switch on 810115
References
LER-81-001-03L-01, LER-81-1-3L-1, NUDOCS 8102030556
Download: ML20003A358 (2)

LER-1981-001, /03L-0:on 810105,core Spray Sparger to Reactor Pressure Vessel D/P Switch 1-PDIS-75-28 Found Set Above Tech Spec Limit.Caused by Barton Model 288 Setpoint Drift.Switch Replaced W/New Switch on 810115

Event date:
Report date:
2591981001R03 - NRC Website

text

.

4RC PORM 366 U. S. NUCLE A3 CEGULATORY COMMISSION (7 77) ~

• LICENSEE EVENT REPORT CONTROL BLOCK: l l

l l lh (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) i e

lolill Aj Ll Bl Rl Fl 1l@150 l0 l-l0 10 l0 l Ol Ol -l Ol Olh 4l 1l Il 1l 1l@l l

l@

7 LICENSEE CODE to LICENSE NVMBE R 24 26 LICENSE TvPE JO

$7 CATSt CCN'T 10111

"?,$ l Ll@l0 15 10 10 lo l2 15 lo @l nl il nl sl a l i @l0 l112 l81811 l@

7 8

60 61 DOCK E T NUV9 g R 68 69 EVENT D ATE 14 75 RE PORT D A TE 80 EVENT CESCRIPTION AND PROB ABLE CONSEQUENCES h I O I 21 l During normal operation, while performine SI 4.2.B-24. core surny sparzer to I

t o t a l I RPV d/p switch 1-PDIS-75-28 was found set at 1.4 osid.

T.S. 3.2.B limit is Q l 2 +/- 0.4 psid. Redundant switch 1-PDIS-75-56 was operable. There was no effect i

I l o I s l I on the health or safety of the public. Previous event: 259/8087.

I 10161 l l

10171 l l

l o !s i l l

' S'E

1. 1. $E s sci $E C

C0 COuPONENT COof sueCOof sENE lOl91 l Il Bl@ J@ W@ lI lN l S lT lR lU l@ J@ J @

7 8

9 10 11 12 13 18 19 20 SE QU E N TI AL OCCUR RE NCE REPORT REvt$ SON

_ EVENT YE AR REPORT NO.

COOE TYPE NO

@ lLE4 RO18111 1-1 1010111 [g_]

I 01 31 W

[-j i al

'j,7; 21 22 23 24 26 27 28 29 JJ 31 32 A E ACT ON ONP NT ME HOURS S8 i FOR 8.

$VPPL MANUFACTbpER lEl@lZl@

lZl@

lZl@

l010l010I [1]@

LJj@

W@

l B l 01810 l@

J3 34 JS M

32 M3 el 42 4J M

47 CAUSE CESCRIPTION AND CORRECTIVE ACTIONS @

l i l o l l The Barton model 288 setpoint had drif ted.

The switch was recalibrated and I

m i functionally tested for repeatability. The switch was reolaced with a neu switch I

Lt_j u lon January 15, 1981. No further action is planned.

I Iiii1 !

l Wl l

7 s 3 90 5A S

% POWER OT:'ER $7ATUS SO RY DISCOVERY 0ESCRIPTION A J@ l1 l 0 l 0 l@l NA l

[B_J@lSurveillanceTesting l

ACTIVITY CO TENT W J @D QP nELEASEU@l RELEASE AMOUNT OF ACTiv TY LOC ATION OF RELEASE NA l

l NA l

7 d 3 10 t1 44 AS 80 PERSONNEL F5 POSURES NUMRER TYPE DE SCRIPTION l1 l 71 l 01 0 l O i@]@l NA I

eERsONNE't :NJu' lits NLvPE R

DESCRIPTION

W l0l0l0l@l NA l

7 3 3 i1 12 60 fyPt

,E C

• T ON LzJ@l NA l

i,

r 4 9 0

SO ssLE E SLRIP fiON uhJ LIJ81 NA I

lIlIlIllIllIl$I 7

4 3 to 68 69 80 5 0

NAVE OF PREPARER PHONE:

Tennessee Valley Authority Form BF417 Browns Ferry Nuclear Plant BF 15.2 1/10/79 LER SUPPLEMENTAL INFORMATION BFRO 259 / 8101 Technical Specification Involved 3.2.B Reported Under Technical Specifir ation 6.7.2.b(1)

Date of Occurrence 1/5/81 Time of Occurrence 1300 Unit 1

Identification and Description of Occurrence:

While performing S1 4.2.B-24, core spray sparger to reactor pressure vessel differential pressure switch 1-PDIS-75-28 was found set at 1.4 psid.

.T.S.

limit is 2 +/- 0.4 psid.

Conditions" Prior to Occurrence:

Unit 1 at 1001 Unit 2 at 75%

~

.. Unit 3 refueling 4

Action specified in the Technical Specification Surveillance Requirements met due to inoperable equipment. Descrioe.

None Apparent Cause of Occurrence:

Instrument drift Analysis of Occurrence:

There was no danger to the health or safety of the public, no release of activity, no damage to plant or equipment and no resulting significant chain of events.

~

Corrective Action

Recalibration functionally tested and returned to service. The switch was replaced on January 15, 1981.

Failure Data:

~

259/8087

• Retention:

eriod - Lifetime; Responsibility - Administrative Supervisor

• Revision :

uw

--,e s

w a