05000334/LER-1979-013-03, /03L-0 on 790522:during Surveillance of Control Room Habitability Sys,Pressure Regulators for Control Room Pressurization Were Found Cycling.Caused by Improper Calibr. Controls Tuned & Procedure Revised

/03L-0 on 790522:during Surveillance of Control Room Habitability Sys,Pressure Regulators for Control Room Pressurization Were Found Cycling.Caused by Improper Calibr. Controls Tuned & Procedure Revised

ML19269E601
Person / Time
Site:	Beaver Valley
Issue date:	06/21/1979
From:	Werling J DUQUESNE LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19269E593	List: 05000334/LER-1979-009-03, /03L-0 on 790320:during Surveillance Test,Diesel Generator 1 Output Breaker Failed to Close Upon Actuation of Control Switch.Cause of Inoperable Breaker Unknown.Operators Reinstructed in Test Circuit & Surveillance Increased 05000334/LER-1979-013-03, /03L-0 on 790522:during Surveillance of Control Room Habitability Sys,Pressure Regulators for Control Room Pressurization Were Found Cycling.Caused by Improper Calibr. Controls Tuned & Procedure Revised ML19269E592
References
LER-79-013-03L, LER-79-13-3L, NUDOCS 7906290339
Download: ML19269E601 (1)

LER-1979-013, /03L-0 on 790522:during Surveillance of Control Room Habitability Sys,Pressure Regulators for Control Room Pressurization Were Found Cycling.Caused by Improper Calibr. Controls Tuned & Procedure Revised

Event date:
Report date:
3341979013R03 - NRC Website

text

.

NR FORMd65 U. S. NUCLE AR REGULATORY COMMISSION tr.m 1.!CENSEE EVENT REPORT CONTROL BLOCK: l l

l l

l l.!h (PLEASE PRINT OR TYPE ALL REQUIREO INFORMATIONI i

ITI l l P l A l 3 l V l S l 1 {@l 0 l 0 l-l 0 l 0 l 0 l 0 l 0 l-l0 l 0 l@l4 l1 l1 11 l 1 l@l l

l@

7 8 9 LICENSEE CCCE le 16 uCENSE NuM8EM

S 26 uCENSE TYPE Jo 5 7 W 58 CCN'T 1","c, l L @l 0 l 5 l 010 l 0 l 313 l 4 @l 0 l 5 ' 2 l 2 l 7 l 9 @ 750 l 6 l 2 l 11 7 ! 9 l@

o 1

7 8

60 61 COCKETNUMBER 68 Es (NT CATE 74 REPCRT DATE 80 EVENT DESCRIPTION AND PROSABLE CONSECUENCES h During performance of a surveillance test on the control room habitability system, l

o 2

The I f5iT) l the pressure regulators for control room pressurization were observed cycling.

Itest was suspended and an investication was commenced to determine the cause of the l o

4 Lo 15_] I ma l f unc t ion. The cycline might have caused insufficient air capacity to pressurize 1 o

o ts Icontrol room for recuired hour.

Presstiri: ation fan was nnerable for backup.

I l

o 7

i l

old l 80 7

8 9 SYSTEM

CAUSE

CAUSE CCMP.

VALVE CODE CCOE

$USCODE CCVPCNENT CODE SU8COCE SU8C00E o

9 lS lG l@ l Dl@

ZlQ l Il Nl Sl Tl Rl UlQ {g l Zl@

7 s

e io n

12 i3 i8 is a

SEQUENTIAL CCCURRENCE REPORT REVISION LER/RO EVENTVEAR R EPORT NO.

CODE TYPE No.

~

@,RE,m,,RTl7l9l l-l l 0l 11 3l l/l l0 13 l l Ll l_l W

u

_2n 22

3 24 26 27 28 M

JG 31 32 T

N AC 0 ONP NT ME HOUR $

$8 i PCR h 8.

$ P LIE MAN P C RER tr_J@LE.J@

LzJ@

l zi@

l ol of a 01 bj@

INl@

lzl@

l zl 919191@

33 34 3a 06 37 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h l The pressure controllers had been calibrated with nominal cain and reset values l

i o

linstead of fine tuning the controllers which caused the valves to evele.

The I

i i

l controls were tuned and the crocedure revised to incorocrate the exact cain and l

i 2

l reset values.

l 3

3 I

41 I 1

80 7

8 9 ST

% PC)NER CTH.*R STATUS Ol$

RV OtSCOVERY C ESCRIPTION l Gl@ l 0 l 0 l 0l@l N /A l

l Bl@l Surveillance test l

1 s

0 AMOUNT OF ACTIVITY @ l LOCATION CP RELEASE @

A VITY CC TENT REi. EASED OP RELEASE N/A l

N/A l

t 16 l Z l @ J@l PERscNNEL ExPCsEaE:

oE CRiPTiCN @

NUuSER TvPE iI7 l0l0l0l@lZlhl N/A l

PERSONNE L INJURIES h

NUU8ER DESCRIPTtCN ila 101ol0!@l N/A

@h h

l CSS oF OR 0 AGE TO PAC:LtTY TYPE CESCRIPTION t ( 91 l Z lhl N/A l

7 4 3 IO SQ issue [@o'lTCR,, Tion @

7906200 3 37 NRC use cNov IN l

N/A I

IIJ11lll ll Iflj 260 68 69 80 ;

7 4 3 to

'E 412-643-1158 NAME OF PREPARER PHONE: