ML20055H879
| ML20055H879 | |
| Person / Time | |
|---|---|
| Site: | South Texas  |
| Issue date: | 05/08/1990 |
| From: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | |
| Shared Package | |
| ML20055H877 | List: |
| References | |
| FOIA-90-258 NUDOCS 9007310083 | |
| Download: ML20055H879 (11) | |
Text
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n-POWER ~ REACTOR EVENT-NUMBER:
'18408-FACILITY:-SOUTH TEXAS REGION:
4 NOTIFICATION DATE: 05/08/90.
UNIT:-
. [ J-[2] [ J-STATE: TX NOTIFICATION TIME: 01:46-[ET)
RX TYPE: '[1] W-4-LP-[2] W-4-LP EVENT DATE:
05/08/90' EVENT TIME:
00:30(CDT)
NRC NOTIFIED BY:; SICARD LAST UPDATE DATE:
05/09/90 HQ OPS OFFICER:
RAY SMITH NOTIFICATIONS I
EMERGENCY CLASS: UNUSUAL EVENT 10 CFR SECTION:
STETKA/ COLLINS RDO AAEC_.50. 72 (a) (1) (i)
EMERGENCY DECLARED THOMAS EO ASHU 50.72 (b) (1) (1) ( A)
PLANT S/D REQD BY TS AUSTIN FEMA ZECH/ JORDAN AEOD UNIT' SCRAM CODE RX CRIT INIT PWR INIT RX MODE CURR PWR CURR RX MODE 2
N Y
100 POWER OPERATION 10 POWER OPERATION EVENT TEXT t'
THE UNIT DECLARED AN UNUSUAL EVENT DUE TO COMMENCING A SHUTDOWN REQUIRED BY TECH' SPEC 3.4.6.1 FOR~ PRESSURE BOUNDARY LEAKAGE.
IT HAS BEEN DETERMINED THAT THERE IS ABOUT A 10 ML/ MIN PRESSURE BOUNDARY JLEAK.ON THE 2C SG PRIMARY SIDE DRAIN (CHANNEL HEAD DRAIN VALVE RC-0097).
'THE-LEAK IS AT A WELD ON AN 8" LENGTH OF PIPE UPSTREAM OF THE DRAIN VALVE.
l THE-' FIRST INDICATION OF THIS LEAK WAS A SLIGHT INCREASE IN CONTAINMENT GASEOUS ACTIVITY OVER A WEEK ~AGO.-
A ROBOT WAS SENT INTO CONTAINMENT TO
' ATTEMPT TO LOCALIZE THE LEAK.
WHEN IT WAS DETERMINED THAT THE LEAK MIGHT
'BE FROM A PRESSURE BOUNDARY, A POWER REDUCTION WAS COMMENCED AT 2153 CST 05/07/90 TO ALLOW PERSONNEL TO ENTER CONTAINMENT TO INVESTIGATE FURTHER. AT 0030 CST 05/08/90, PERSONNEL-CONFIRMED THAT IT WAS PRESSURE BOUNDARY LEAKAGE AND THE UNUSUAL EVENT WAS DECLARED.
THE UNIT HAS 6 HOURS TO BE IN
= MODE 3 AND THEN COLD S/D IN THE FOLLOWING 30 HOURS.
l THE UNIT IS PROCEEDING WITH THE SHUTDOWN TO COLD S/D TO MAKE REPAIRS.
L ESTIMATED RESTART DATE IS 05/22/90
.THERE IS NO RAD RELEASE OR PROBLEN 'ITH HIGH RAD LEVELS IN CONTAINMENT.
THERE IS.NOTHING ELSE UNUSUAL,- HOK./ER, NOTE THAT THE "A" TRAIN ESF 1 EQUIPMENT IS OUT OF SERVICE FOR A SCHEDULED OUTAGE.
L
'THE NRC RESIDENT AND THE STATE AND LOCAL AUTHORITIES HAVE BEEN NOTIFIED.
A PRESS RELEASE WILL PROBABLY BE ISSUED IN THE MORNING.
UPDATE AT 0356 ON 5/9/90 BY BERRENS ENTERED BY BLOOM * * *
. LICENSEE TERMINATED THE UNUSUAL EVENT WHEN THEY ENTERED MODE 5 AT 0252 CDT.
THE' LEAK IS NOW BARELY DRIPPING.
THE LICENSEE WILL INFORM THE NRC RESIDENT INSPECTOR.
NOTIFIED R4DO(STETKA), EO(ROSSI), FEMA (WIDNER).
I 9007310083 900726 PDR FOIA I
GARDE 90-258 PDR
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