ML17157A261
| ML17157A261 | |
| Person / Time | |
|---|---|
| Site: | Susquehanna  |
| Issue date: | 07/26/1990 |
| From: | Thadani M Office of Nuclear Reactor Regulation |
| To: | Keiser H PENNSYLVANIA POWER & LIGHT CO. |
| Shared Package | |
| ML17157A262 | List: |
| References | |
| TAC-75920, TAC-75921, NUDOCS 9008060095 | |
| Download: ML17157A261 (3) | |
Text
July 26, 1990 Docket Nos. 50-387/388 Nr. Harold W. Keiser Senior Vice President-Nuclear Pennsylvania Power and Light Company 2 North Ninth Street Allentown, Pennsylvania 18101
Dear Hr. Keiser:
Distribution I ~88-383/388
'RC
& Local PDRs PDI-2 R/F WButler BBoger NO'Brien MThadani OGC EJordan ACRS (10)
RBlough RSwetland Lh1arsh
SUBJECT:
UNREVIEWED SAFETY CONCERNS RELATED TO DIESEL GENERATORS'NLET AIR MODIFICATION, SUSQUEHANNA STEAN ELECTRIC STATION, UNITS 1
AND 2 (TAC NOS. 75920 and 75921)
By letter dated June 7, 1990, you requested our approval to install a modification
'o Susquahanna Steam Electric Station's (SSES) diesel gen'erators.
The proposed modification would control the combustion air inlet temperature to a range recommended by the manufacturers.
3.
You indicated that two portions of the control equipment are not qualified items and are temporarily installed until qualified equipment can be procured.
You expect the qualified equipment to be in place by the end of 1990.
You further indicated that installation of commercial (non-qualified) equipment could create new failure mechanisms and could have higher probability of failure than that associated with the original design.
Consequently, the proposed modifications give rise to an unreviewed safety concern.
We have evaluated the impact of the failures of new valves and the failures of the associated commercial grade components, and conclude that the overall safety function of the diesel generators is not compromised provided that the
'qualified equipment is in place by the end of 1990.
Our safety evaluation supporting our conclusion is enclosed.
S incerely,
/s/
Enclosure:
Safety Evaluation cc w/enclosure:
See next page LTR DOCK 50-387/
Mohan C. Thadani, Project Hanager Project Directorate I-2 Division of Reactor Projects I/II Office of Nuclear Reactor Regulation LA
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Mr. Harold W. Keiser Pennsylvania Power E Light Company Susquehanna Steam Electric Station Units I & 2 CC:
Jay Silberg, Esq.
Shaw, Pittman, Potts 5 Trowbridge 2300 N Street N.W.
Washington, D.C.
20037 Bryan A. Snapp, Esq.
Assistant Corporate Counsel Pennsylvania Power 5 Light Company 2 North Ninth Street Allentown, Pennsylvania 18101 Mr. J.
M. Kenny Licensing Group Supervisor Pennsylvania Power 8 Light Company 2 North Ninth Street Allentown, Pennsylvania 18101 Mr. Scott Barber Senior Resident Inspector U. S. Nuclear Regulatory Commission P.O.
Box 35 Berwick, Pennsylvania 18603-0035 Mr. Thomas M. Gerusky, Director Bureau of Radiation Protection Resources Commonwealth of Pennsylvania P. 0.
Box 2063 Harri sburg, Penn sy1 vani a 17120 Mr. Jesse C. Tilton, III Allegheny Elec. Cooperative, Inc.
212 Locust Street P.O.
Box 1266 Harri sburg, Pennsylvani a 17108-1266 Mr. S. B. Ungerer Joint Generation Projects Department Atlantic Electric P.O.
Box 1500 1199 Black Horse Pike Pleasantville, New Jersey 08232 Regional Administrator, Region I U.S. Nuclear Regulatory Commission 475 Allendale Road King of Prussia, Pennsylvania 19406 Mr. Harold G. Stanley Superintendent of Plant Susquehanna Steam Electric Station Pennsylvania Power and Light Company 2 North Ninth Street Al1entown, Pennsylvania 18101 Mr. Herbert D. Woodeshick Special Office of the President Pennsylvania Power and Light Company 1009 Fowles Avenue Berwick, Pennsylvania 18603 Mr. Robert G. Byram Yice 'President-Nuclear Operations Pennsylvania Power and Light Company 2 North Ninth Street Al1 entown, Pennsy1 vani a 18101