05000265/LER-1978-039-03, /03L-0 on 781218:test Results Found HPCI Initiation Switches Associated W/Drywell Pressure Instruments Not in Accordance W/Tech Specs.Caused by Procedural Inadequacy;Switches Excluded from Test Program

/03L-0 on 781218:test Results Found HPCI Initiation Switches Associated W/Drywell Pressure Instruments Not in Accordance W/Tech Specs.Caused by Procedural Inadequacy;Switches Excluded from Test Program

ML19261A838
Person / Time
Site:	Quad Cities
Issue date:	01/16/1979
From:	Tietz G COMMONWEALTH EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML19261A834	List: 05000265/LER-1978-039, Forwards LER 78-039/03L-0 05000265/LER-1978-039-03, /03L-0 on 781218:test Results Found HPCI Initiation Switches Associated W/Drywell Pressure Instruments Not in Accordance W/Tech Specs.Caused by Procedural Inadequacy;Switches Excluded from Test Program
References
LER-78-039-03L, LER-78-39-3L, NUDOCS 7902080222
Download: ML19261A838 (2)

LER-1978-039, /03L-0 on 781218:test Results Found HPCI Initiation Switches Associated W/Drywell Pressure Instruments Not in Accordance W/Tech Specs.Caused by Procedural Inadequacy;Switches Excluded from Test Program

Event date:
Report date:
2651978039R03 - NRC Website

text

..

17 77)

LICENSEE EVENT REPORT h 90L tiLOCK; I l

l l

l l

l (PLE ASE PRINT OR TYi'E AI.L REQUIRED INF oRMATION) 1 6

lo lf [ll L Q l A l D l 2 l@! Ol 0 0l -l 0l 0 0 l - l 0 l 0 l 0 l@l 4 l 1 l1 l1 l1 @{

l l@

h 9 LICihSEE EQOL 14 3

LICU.5E PMP.;EH 2a 20 LICErsSL TYPE JJ 5 7 C A T t.8 COY T sj."n ] l L j@l 0 l 5 l 0 l 0 l0 l2 l6 15 l@l1l2l1l8l7l8]@l0l1 11 16 17 19 l@

l0 i

7 8

60 61 DOCK ET f.UY3 EH 63 03 EVENT DATE

/4 75 REPO;tT DATE 80 EVENT DESCRIPTION AND PRO 3 ABLE CONSEQUENCES h [o l2 ] l The calibration and functional test surveillance frequency for testina the HPC l

initiation switches associated with drywell pressure instruments PS l-1001-89A thru D _l g

3 g was found not be in accordance with Technical Specification Table 4.2-1.

Upon g

4 calibration, all switches were found to be within the prescribed limits, thus HPCI l

g g

g g

g initiation was not jeopardized by this event.

I o

7 l

I o

a I 80 7

8 9 SYSTEM

CAUSE

CAUSE COVP.

VALVE CODE CODE SUBCODE COMPONENT CODE SU0 CODE SUSCODE l 1 l B l@ lD l@ lZl@ l llNlSlTlRlUl@ W @ d @

l0 9

7 8

9 10 11 12 13 18 19 20 SEQUENTI AL OCCURRENCE REPORT REVISION LE R/RO EVENT YE AR REPOHT NO.

CODE TYPE r.O.

@ gPOg l21 7l 8l l-l l01319l [2]

lOl3_j bJ I-l Le_.J 22 23 24 26 27 2d 29 30 31 32 AKEf ACT t O PLANT HOURS S O IT Fonti B.

S P LI E MAN FAC URER l G l@! Zlg l32 Z i@Lzj@

l 0 l010 W I l vl@

lNI@

INI@

IS131812 l@

33 34 36 3/

40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h 1 O l Procedural inadequacy-The HPCI switches were inadvertently excluded f rom the monthly l

i l3 l l ECCS test program.

Previously these switches have been functionally tested each I

perating cycle. Temporary testing procedures have been written to include the HPCI l

i 2

(

J

, l initiation switches, and permanent revisions are being processed.

l

'l l i 141 1 80 7

8 9 STA S

• . PO OTHER STA TUS 15C FY DISCOVERY DESCHiPTION l EJ g l 0l bERl 7l@l NA l

l Zl@l NA l

i 5

ACllVITY CONTENT RtLEASED OF HELE ASE AMOUNT OF ACT!VITY LOCArlON OF RE LEAS; NA l

l NA l

Z l @ l Zl@l lt r2 J

B 9 10 11 44 42 80 PL HSON'.EL E XPOSUR ES NU'/G E R TYPE DESCRIPTION -

l p

i l 0 l 0 l 0 l@l Zl@l NA rE n SON N a',N;u'n', E S DeSCniPTiON@

r.um n NA l

U 10 l 0101@l 83 51 9 11 12 L 0% OF OF DAMAGE iO FAElliTY Tv E DESCntPItON NA l

! i l o l [__J@l so s 9 to h1HLIC8TY NRC UE ONLY l,i;i,iiiii;ij g ggj=">

"o" 7 9 0 2 0 8 0 AA2.

i n,

u c9 so s a 3 i0

?L7 - $

. Tietz 109-6 % -2741. e N A*.1E OF PRE P ARE R pgoye:

o l.

LER NUMBER:

LER/R0 78-39/03L-0 11.

LICENSEE NAME: Commonwealth Edison Company Quad-Cities Nuclear Power Station Ill.

FACILITY NA"~'

Unit Two IV.

DOCKET NUMBER:

050-265 V.

EVENT DESCRIPTION

On December 18, 1978, it was noticed that the two switches of PS 2-1001-89A were tested at dif ferent intervals.

These switches sense high drywell pressure and trip at 2.0 psig.

Switch number 1 in conjunction with a low-low reactor water level signal will start the 120 second timer to initiate the Auto Blowdown System. This switch has been functionally tested monthly in accordance with Technical Specification Table 4.2-1.

Switch number 2, which initiates HPCI, has been functionally tested each operating cycle during refuel outages.

Upon discovery of the problem, a temporary procedure was written to calibrate and functionally test the switches. All eight switches were found to be within specifications.

VI.

PROBABLE CONSEQUENCES OF THE OCCURRENCE:

The safety implications of this occurrence are minimal due to the fact HPCI would have initiated as intended had a high drywell pressure condition occurred.

Switch number 2 of PS 1001-89A thru D has been functionally tested each operating cycle with no previous failures since installation.

Vll.

CAUSE

The cause of this occurrence is attributed to procedure inadequacy.

Pressure switches 1001-89A thru D have two separate internal switches, and the HPCI initiation switch was inadvertantly excluded f rom the ECCS instrumentation test program.

Vill.

CORRECTIVE ACTION

The immediate corrective action was to write a temporary procedure, number 1155, to functionally test and calibrate the pressure switches while the unit was in operation.

All four switches were found to be within the prescribed setpoints.

The temporary procedure willbe implemented as a permanent procedure. The pressure swi tches were manufactured by Static-0-Ring, model number 12N-AA5-PP.