PNO-II-93-046, on 930913,reactor Experienced Spurious Low Reactor Water Level Signal & High Pressure Core Spray Pump Started Causing High Water Level Scram.Licensee Planned Actions in Response to NRC Bulletin 93-03 Discussed
| ML20057E303 | |
| Person / Time | |
|---|---|
| Site: | Grand Gulf  |
| Issue date: | 09/14/1993 |
| From: | Cantrell F NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | |
| References | |
| IEB-93-003, IEB-93-3, PNO-II-93-046, PNO-II-93-46, NUDOCS 9310120002 | |
| Download: ML20057E303 (1) | |
September 14, 1993 1
PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE PNO-II-93-046
.This preliminary notification constitutes EARLY notice of events of POSSIBLE safety or public interest significance. The information is as initially I
recaived without verification or evaluation, and is basically all that is known by the Region II staff on this date.
Frcility Licensee Emergency Classification Entergy Operations Inc.
Notification of Unusual Event Grand Gulf 1 Alert Port Gibson, Mississippi Site Area Emergency Dockets: 50-416 General Emergency X Not Applicable
Subject:
UNSCHEDULED OUTAGE IN EXCESS OF 72 HOURS On September 13, 1993, at approximately 3:12 p.m.,
the reactor experienced a spurious low reactor water level signal (Level 2).
The high pressure core spray pump started causing a high water level scram.
The plant is being taken to cold shutdown to replace a leaking section of feedwater pump miniflow line between the bypass valve and the main condenser.
The licensee is backfilling the reactor water level reference legs prior to decreasing reactor pressure below 200 PSI, and initiating shutdown cooling.
NRR and the licensee have discussed the licensee's planned actions that are in response to NRC Bulletin 93-03. Plant restart is currently scheduled for September 17, 1993.
The resident inspector (RI) was onsite when the scram occurred and is following the licensee's corrective actions.
The RI has reviewed the water level charts for abnormal perturbations that might be indicative of reference leg degassing and none were identified.
The State of Mississippi has been informed.
The NRC received initial notification from the licensee to the resident inspector about 3:20 p.m.
(CDT) on September 13, 1993.
i This information is current as of 10:00 a.m.
(EDT) September 14, 1993.
Contact:
FLOYD CANTRELL (404)331-5534 l
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