ML20077E744
| ML20077E744 | |
| Person / Time | |
|---|---|
| Site: | Oyster Creek |
| Issue date: | 12/07/1994 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20077E746 | List: |
| References | |
| NUDOCS 9412130112 | |
| Download: ML20077E744 (1) | |
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7.
Generic Safety Issues As part of the IPE submittal, the licensee proposed resolution of several generic issues including USI A-17, " System Interaction in Nuclear Power Plants;" USI A-47, "S4fety Implications of Control Systems;" Generic Issue L
(GI)-101, "BWR Water Level Redundancy;" and GI-105, " Interfacing System LOCA at BWRs." However, USI A-17, GI-101, and GI-105 were resolved by staff with no new requirements. Accordingly, the licensee's proposed resolution of these issues was not reviewed in detail. The review of the licensee's response to Generic Letter 89-19, " Request for Action Related to Resolution of Unresolved Safety Issue A-47," addresses USI A-47 resolution.
8.
Licensee Actions and Commitments From the IPE The licensee used the IPE process to identify plant and/or procedural modifications.
The IPE took credit for several modifications that the licensee installed during the 14R refueling outage. These include installation of a hard piped containment vent system; operator training for manual initiation of the containment spray system; and installation of interconnection to the combustion turbine generators at the adjacent Forked River Site. The combustion turbine interconnection will make it possible to supply power from the combustion turbines directly to non-essential 4160 V bus IA and emergency loads of essential 4160 V buses IC and ID via cross-tie.
Purchasing a portable power generator and developing procedures for recovering offsite or onsite power were identified as additional improvements for coping with station blackout. While the procedure development is underway, the licensee plans to evaluate the purchasing of an additional AC generator before the 15R refueling outage.
The staff recognizes the licensee's intent to address station blackout events by the interconnection to the two combustion turbines and recovery of AC power procedure development.
IPE findings indicate that there are a number of additional " low-cost" improvements which could enhance overall reactor safety. These planned actions include-o Development of an emergency procedure for loss of Offsite Power.
o Development of an emergency procedure for Loss of DC Power.
o Increased training on the importance of the containment spray system.
o Changes to maintenance scheduling for the containment spray system to improve downtime.
o Modifications to implement the Reactor Overfill Protection System.
o Consider the development of specific guidance, training, and procedures for reactor overfill transients.
o Increased emphasis in training on key operator actions as defined by the IPE.
o Consideration of alternate containment heat removal capability to maintain minimal NPSH as part of Accident Management.
o Alternate water supply for drywell sprays (Accident Management).
18 Revised: December 7,19l 9412130112 941207 ADOCK0500g9 DR