PNO-I-02-020, Unusual Event Due to a Hydrogen Gas Ignition in the Off-Gas System (39348)
| ML023110436 | |
| Person / Time | |
|---|---|
| Site: | |
| Issue date: | 11/07/2002 |
| From: | Rogge J, Roxanne Summers NRC Region 1 |
| To: | |
| References | |
| PNO-I-02-020 | |
| Download: ML023110436 (3) | |
DCS No.: 05000219021106 Date: November 7, 2002 PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE PNO-I-02-020 This preliminary notification constitutes EARLY notice of events of POSSIBLE safety or public interest significance. The information is as initially received without verification or evaluation, and is basically all that is known by the Region I staff on this date.
Facility Licensee Emergency Classification Oyster Creek Nuclear Generating Station X Notification of Unusual Event AmerGen Energy Company Alert Forked River, New Jersey Site Area Emergency General Emergency Not Applicable Docket No.: 05000219 License No.: DPR-16
SUBJECT:
UNUSUAL EVENT DUE TO A HYDROGEN GAS IGNITION IN THE OFF-GAS SYSTEM (#39348)
At 2:40 p.m., an Unusual Event was declared following a hydrogen gas ignition in the off-gas system from the main condenser. No one was injured and there was no radiological release caused by the event. The plant remained in stable operation at full power throughout the event.
Following identification of the hydrogen gas ignition, AmerGen conducted a walk down of the equipment in the off-gas system to identify any potential damage. AmerGen also performed surveys for elevated hydrogen and radiation levels. No equipment damage was identified. No elevated levels of hydrogen or radioactivity were identified from the surveys. Following completion of these activities, AmerGen terminated this Unusual Event at 6:55 p.m.
The initiator of the hydrogen detonation is still under review, but appears to be associated with testing that was being conducted to measure condenser air in-leakage. This involved temporary instrumentation being connected to the off-gas system in the turbine building.
AmerGen Energy Company issued a press release on the event on the evening of November 6, and notified state authorities and the NRC resident inspectors.
This information has been discussed with AmerGen management and is current as of noon on November 7, 2002.
The NRC resident inspectors remained onsite throughout this event and are monitoring AmerGens event evaluation review.
Contact:
Robert Summers John Rogge 609/693-0702 610/337-5146
2 DISTRIBUTIONS:
BY E-MAIL:
OWFN TWFN LST Chairman Meserve IRO PDR Comm. Diaz ACRS Comm. McGaffigan Jr. NMSS Comm. Merrifield OIG Comm. Dicus RES OIP OCA OGC EDO OE NRR SECY Regional Offices BY FAX:
DOT:Trans INPO NSAC RI Resident Office Licensee: ___________________________
(Reactor Licensees)
DOCUMENT NAME: S:\PN\PN102020.wpd OFFICE RI/DRP RI/ORA RI/ORA RI/DRP RI/ORA NAME RBarkley/RSB JRogge/JR DScrenci/RSB RBlough/ARB RBores/RSB for* for DATE 11/07/02 11/07/02 11/07/02 11/07/02 11/07/02
- Reviewed earlier version Region I Form 83 (Rev. August 17, 2000)