ML17158B682
| ML17158B682 | |
| Person / Time | |
|---|---|
| Site: | Susquehanna  |
| Issue date: | 06/19/1996 |
| From: | Poslusny C NRC (Affiliation Not Assigned) |
| To: | Byram R PENNSYLVANIA POWER & LIGHT CO. |
| References | |
| NUDOCS 9606240328 | |
| Download: ML17158B682 (8) | |
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4'+*4k UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 June 19, 1996 g-5K'7 KF Hr. Robert G.
Byram Senior Vice President-Nuclear Pennsylvania Power and Light Company 2 North Ninth Street Allentown, PA 18101
SUBJECT:
STAFF REVIEW OF HODIFICATIONS TO REVISION 4 OF THE BOILING-WATER REACTOR (BWR)
EMERGENCY PROCEDURE GUIDELINES - SUS(UEHANNA STEAH ELECTRIC STATION, UNITS 1
& 2
Dear Hr. Byram:
The staff has issued its safety evaluation (SE) on the recent BWROG-proposed modifications to the BWR Emergency Procedure Guidelines.
The staff is providing this information to ensure that'icensees are aware of the conclusions of the staff's review.
Both the staff and the Advisory Committee for Reactor Safeguards (ACRS) agree that, for BWRs injecting standby liquid control through a standpipe below the core, maintenance of level above top-of-active fuel (TAF) is the superior water control strategy in an anticipated transient without scram (ATWS) event.
The staff recommends a level around TAF
+5 feet (1.52 m), or as high as possible while still maintaining the level at least 2 feet (0.61 m) below the feedwater sparger.
Although control at any level between the minimum steam cooling water level and 2 feet below the feedwater sparger was found to be acceptable, both the staff and ACRS urge that a high-water-level control strategy be adopted.
Additional details are provided in the enclosed SE.
You should also note the staff's position on bypassing the Hain Steam Isolation Valve (HSIV) high radiation closure interlock during ATWS.
The staff agrees with the BWROG's qualitative arguments that keeping the HSIVs open significantly reduces containment loading and makes level control much simpler.
- However, the acceptability of this change is conditional on a plant-specific evaluation by each licensee to assure that, in the event of gross 9i Oeaeoaa8 Veoeiq PDR ADOCK 05000387 P
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I'uel failures, consideration has been given to such items as equipment accessibility, potential off-site 'radiological
- doses, and the appropriate time to manually close the MSIVs.
Sincerely,
/s/
j Chester
- Poslusny, Senior Project Manager Project Directorate I-2 Division of Reactor Projects I/II Office of Nuclear Reactor Regulation Docket Nos. 50-387/50-388
Enclosure:
Safety Evaluation Report cc w/encl:
See next page DISTRIBUTION: w/Enclosure '"
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Byram fuel failures, consideration has been given to such items as equipment accessibility, potential off-site radiological doses, and the appropriate time to manually close the MSIVs.
Sincerely,
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Chester
- Poslusny, Sknior Project Manager Project Directorate I-2 Division of Reactor Projects I/II Office of Nuclear Reactor Regulation Docket Nos. 50-387/50-388
Enclosure:
Safety Evaluation Report cc w/encl:
See next page
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Hr. Robert G.
Byram Pennsylvania Power
& Light Company Susquehanna Steam Electric Station, Units 1
& 2 CC:
Jay Silberg, Esq.
- Shaw, Pittman, Potts
& Trowbridge 2300 N Street N.W.
Washington, D.C.
20037 Bryan A. Snapp, Esq.
Assistant Corporate Counsel Pennsylvania Power
& Light Company 2 North Ninth Street Allentown, Pennsylvania 18101 Hr. J.
M. Kenny Licensing Group Supervisor Pennsylvania Power
& Light Company 2 North Ninth Street Allentown, Pennsylvania 18101 Mrs. Haitri Banerjee Senior Resident Inspector U. S. Nuclear Regulatory Commission, P.O.
Box 35 Berwick, Pennsylvania 18603-0035 Hr. William P. Dornsife, Director Bureau of Radiation Protection Pennsylvania Department of Environmental Resources P. 0.
Box 8469 Harrisburg, Pennsylvania 17105-8469 Hr. Jesse C. Tilton, III Allegheny Elec. Cooperative, Inc.
212 Locust Street P.O.
Box 1266 Harrisburg, Pennsylvania 17108-1266 Regional Administrator, Region,.I U.S. Nuclear Regulatory Commission 475 Allendale Road King of Prussia, Pennsylvania 19406 Hr. Harold G. Stanley.
Vice President-Nuclear Operations Susquehanna Steam Electric Station Pennsylvania Power and Light Company Box 467 Berwick, Pennsylvania 18603 Hr. Herbert D. Woodeshick Special Office of the President Pennsylvania Power and Light Company Rural Route 1,
Box 1797 Berwick, Pennsylvania 18603 George T. Jones Vice President-Nuclear Engineering Pennsylvania Power end Light Company 2 North Ninth Street Allentown, Pennsylvania 18101 Dr. Judith Johnsrud National Energy Committee Sierra Club 433 Orlando Avenue State College, PA 16803 Chairman Board of Supervisors 738 East Third Street
.Berwick, PA 18603
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