05000366/LER-1980-137-03, /03L-0:on 800929,during Plant Shutdown,While Performing HPCI Turbine Exhaust Diaphragm Functional Test & Calibr,Pressure Switch Actuated Contrary to Tech Spec.Caused by Setpoint Drift.Switch Recalibr & Functionally Tested

/03L-0:on 800929,during Plant Shutdown,While Performing HPCI Turbine Exhaust Diaphragm Functional Test & Calibr,Pressure Switch Actuated Contrary to Tech Spec.Caused by Setpoint Drift.Switch Recalibr & Functionally Tested

ML19338G132
Person / Time
Site:	Hatch
Issue date:	10/21/1980
From:	Nix R GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19338G127	List: 05000366/LER-1980-137, Forwards LER 80-137/03L-0 05000366/LER-1980-137-03, /03L-0:on 800929,during Plant Shutdown,While Performing HPCI Turbine Exhaust Diaphragm Functional Test & Calibr,Pressure Switch Actuated Contrary to Tech Spec.Caused by Setpoint Drift.Switch Recalibr & Functionally Tested
References
LER-80-137-03L, LER-80-137-3L, NUDOCS 8010280476
Download: ML19338G132 (2)

LER-1980-137, /03L-0:on 800929,during Plant Shutdown,While Performing HPCI Turbine Exhaust Diaphragm Functional Test & Calibr,Pressure Switch Actuated Contrary to Tech Spec.Caused by Setpoint Drift.Switch Recalibr & Functionally Tested

Event date:
Report date:
3661980137R03 - NRC Website

text

wv LICENSEE EVENT REPORT CON 1nOLBLOCK: l l

l l

l l lh (PLE AsE PRINT OR TYPE All. nEOUIRED INFORMATION) i e

lGlAlElIlHl 2 l@l 0 l 0 l - l 0 l 0 l 0 l 0 l 0 l - l 0 l 0 l@l 4 l 1 l 1 l 1 l 1 l@l l

lg o i 7

8 9 LICENSEE CODE 14 15 LICENSE NUMBEH 2b

t6 LICENSE life JO b 7 CAI t,8 S$"C Ql 0 l 5 ] 0 l 0 l 0 l 3 l 6 l 6 l@l 0 l 9 l 2 l 9 l 8 l 0 l@]l l 0 l 2 l i l 8 l 0 l@

8 60 66 DOLKET NUY3E H 68 6')

EVE NT DATE 74 lb REPORT DATE 80

'7 EVENT DESCRIPTION AND PROBADLE CONSEQUENCES O 2 l With the plant shutdown and performing HNP-2-3309, High Pressure Coolant l

Injection Turbine Exhaust Diaphragm Pressure Functional Tes't arid Calibra-l lo l3 j l tion, 2C41-N012D HPCI Turbine Exhaust Diaphragm pressure switch actuated l

In14i i at 11.8 psig. Tech Spec table 3.3.2-2 requires actuation at 510 psig. Re-l o s l dundant switches 2E41-N012A, B and C were within tolerance. Public health l

o o l o 7 l and safety was not affected. Plant operation was not affected. This is a l

repetitive event as last reported on Reportable Occurrence 50-366/1980-020.

,o m ;

DE C DE SUBC C COVPONENT CODE SUDC D'E SU DE l Il B l@ W@ l Z l@ lI lN lS lT lR [U l@ W@ Q @

O o 7

8 9

10 11 12 13 18 19 20 SEQUE N TI AL OCCU R R E NCE REPOHT REVISION LE R EVENT YEAR REPORT NO.

CpDE' TYPE N O.

O aEg'RO l 8l Ol l-l,

l1 l317 l y

l Ol 3l [L_j l-l [0_j ni yV

_ 21 27 23 24 26 27 28 29 30 31 32 AKEN ACT ON ON PL T.

VETH HOURS SUD ITT FO ki b B.

SU PL1 i MAN FACTURER LE_J@LLJ@

Lz J@

LZ JO 101010 lo I lY l@

l Nl@

l Nj@

lBl0l6l9]@

(V 3J 34 3b -

36 -

31 40 41 42 43 44 47 i

CAUSE DESCRIPTION AND CORnECTIVE ACTIONS h liloll The cause of this event has been attributed to setpoint drift. The l

i i I

switch was immediately recalibrated as per HNP-2-5279, Barksdale I

i 2 l Pressure Switch Calibration, and functionally tested successfully. No i

lil3l l further reporting is required.

l I

li l41 i

^

'STEUS 4 POWER OTH ER ST ATUS ISCO Y

OtSCOVERY DESCRIPTION li 15 I (._Gj@ l 0 l 0 l 0 l@l NA l

[B_J@l Surveillance l

ACTIVIT Y CONTENT NELE ASCO OF RELE ASE AMOUNT OF ACTIVITY LOC ATION OF RELEASE [Z_] @ [Z_J@l NA l

l NA l

i G 7

8 9 10 tt 44 45 80 PEHSONNEL EXPOSURES NUWLE R TYPE

DESCRIPTION

l 0 l 0 ] 0 l@l Z l@l NA l

i 7 PtosONw't is;Un'iES NUMA E R DESCRIP TION l0l0l0l@l NA l

i s 7

8 9 11 12 80 E OSS OF On DAMAGE TO F ACILITY h TYPE DESCHlP TION v

l Zj@l NA l

i ;

7 8 9 10 80 l_f l

NA l

lllllllllllll$;

ISSUdt @ DESCRIPTION 2 o 68 69 60 7, 7

H 9 to

~

~

PHONE:

8 ()] g M

F PREPARER

LJR No.: 50-366/1980-137

{s~T

/

Licensee: Georgia Power Company Facility Name:

Edwin I. Hatch Docket No.: 50-366

Narrative

Peport for LER 50-366/1980-137.

On September 29, 1930, while the reactor was shutdown and while performing HNP-2-3309, HPCI Turbine Exhaust Diaphragm Pressure Func. ional Test and Calibration, pressure switch 2E41-N012D was found actuating at 11.8 psig.

Tech Spec Tabic 3.3.2-2 requires actuation at 510 psig. P.eduadant switches 2E41-N012A, B and C were operable and in tolerance.

Public health and safety was not affected by this event.

Plant operation was not affected by this event. This event was repetitive as last reported on Reportable

~

Occurrence Report 50-366/1980-02(-

The cause of this event has been attributed to setpoint drift.

The switch, Darksdale Model D?H, was immediately recalibrated as per HHP-2-5279, Barksdale Pressure Suitch Ca.ibration, and functionally tested successfully and returned to service.

The unit is now in full compliance and no further reporting is required.

2 A generic review of this event revealed no inherent problems.

Unit I does not use the same type switch for this application.

(/

u.