ML17157A726
| ML17157A726 | |
| Person / Time | |
|---|---|
| Site: | Susquehanna  |
| Issue date: | 06/13/1991 |
| From: | Raleigh J Office of Nuclear Reactor Regulation |
| To: | Keiser H PENNSYLVANIA POWER & LIGHT CO. |
| References | |
| TAC-80107, TAC-80108, NUDOCS 9106210229 | |
| Download: ML17157A726 (6) | |
Text
June 13, 1991 Docket Nos. 50-387 and 50-388 Mr. Harold W. Keiser Senior Vice President-Nuclear Pennsylvania Power and Light Company 2 North Ninth Street Allentown, Pennsylvania 18101
Dear Mr. Keiser:
DISTRIBUTION:
NRC
& Local PDRs PDI-2 Reading SVarga JCalvo MO'Brien(2)
JRaleigh OGC
- EJordan, 3701
- RBlough, RGN-I
- JWhite, RGN-I SUBJECT REQUEST FOR ADDITIONAL INFORMATION ON THE PROPOSED CHANGES TO THE SUSQUEHANNA STEAM ELECTRIC STATION, UNITS 1 AND 2, TECHNICAL SPECIFICATION REQUIREtlENTS RELATED TO THE RWCU/HPCI/RCIC TEMPERATURE SETPOINTS FOR LEAK DETECTION (TAC NOS.
80107 AND 80108)
The staff has reviewed the request that was made by Pennsylvania Power and Light Company (PP&L or the licensee) of January 9, 1991, related to the ambient and differential temperature setpoints for isolation of the reactor water cleanup (RWCU) system, the reactor core isolation cooling (RCIC) system and the high pressure coolant injection (HPCI) system for the Susquehanna Steam Electric Station (SSES),
Unit Nos.
1 and 2.
Based on this review, we have concluded that sufficient information and justification to support the proposed changes to the SSES Technical Specification (TS) requirements has not been provided.
As a result of the review, the staff has developed comments which form the basis of this request for additional information.
These comments are provided in the enclosure.
If there are any questions regarding this letter please contact me on (301) 492-1447.
This requirement affects fewer than 10 respondents and, therefore, is not subject to Office of Management and Budget review under P.L.96-511.
Sincerely,
Enclosure:
Staff Comments cc w/enclosure:
See ext age
/S/
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Docket Nos.
50-387 and 50-388 UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555 June 13, 1991 ter. Harold W. Keiser Senior Vice President-Nuclear Pennsylvania Power and Light Company 2 North Ninth Street Al 1 entown, Pennsylvania 18101
Dear ter. Keiser:
SUBJECT REQUEST FOR ADDITIONAL INFORMATION ON THE PROPOSED CHANGES TO THE SUSOUEHANNA STEAtl ELECTRIC STATION, UNITS I AND 2, TECHtlICAL SPECIFICATION REQUIREIIENTS RELATED TO THE RWCU/HPCI/RCIC TEMPERATURE SETPOINTS FOR LEAK DETECTION (TAC NOS.
80107 AND 80108)
The staff has reviewed the request that was made by Pennsylvania Power and Light Company (PPSL or the licensee) of January 9, 1991, related to the ambient and differential temperature setpoints for isolation of the reactor water cleanup (RWCU) system, the reactor core isolation cooling (RCIC) system and the high pressure coolant injection (HPCI) system for the Susquehanna Steam Electric Station (SSES),
Unit Nos.
1 and 2.
Based on this review, we have concluded that sufficient inforIIIation and justification to support the proposed changes to the SSES Technical Specification (TS) requirements has not been provided.
As a result of the review, the staff has developed comments which form the basis of this request for additional information.
These comments are provided in the enclosure.
If there are any questions regarding this letter please contact me on (301) 492-1447.
This requirement affects fewer than 10 respondents and, therefore, is not subject to Office of Management and Budget review under P.L.96-511.
Sincerely,
Enclosure:
Staff Comments cc w/enclosure:
See next page James J. Raleigh, Acting Project Manager Project Directorate I-2 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation
ENCLOSURE STAFF COMMENTS REGARDING PROPOSED REVISIONS TO THE SUSQUEHANNA STEAM ELECTRIC STATION TECHNICAL SPECIFICATION REQUIREMENTS RELATED TO THE RWCU/HPCI/RCIC TEMPERATURE SETPOINTS FOR LEAK DETECTION (DOCKET NOS.
50-387 AND 50-388)
Pennsylvania Power and Light Company (PP8L or the licensee) requested NRC review and approval of a proposed change to the Technical Specification requirements related to the ambient and differential temperature setpoints for isolation of the reactor water cleanup (RWCU) system, the reactor core isolation cooling (RCIC) system and the high pressure coolant injection (HPCI) system for the Susquehanna Steam Electric Station (SSES),
Unit Nos.
1 and 2, by letter of January 9, 1991.
The staff has completed its review of the licensee's request.
In general, the request was lacking in substance and in detai 1 to justify the changes that were being proposed to the Technical Specification (TS) requirements.
The following comments are provided for review.and consideration by the licensee:
1.
It is not clear why a change to the existing temperature setpoints is necessary.
The licensee stated that the existing setpoints will not allow for timely detection of a five gpm leak, but the licensee did not define what leak rates the existing setpoints will detect.
The current capability must be defined, and the acceptability of the existing condition must be addressed.
2.
The licensee credits certain temperature calculations in its safety
- analysis, but the details of the temperature calculations were not provided for staff review.
It is not clear to the staff what assumptions were made and whether those assumptions are acceptable or not.
- Also, specific details regarding the application of the computer model COTTAP were not provided for staff review.
3.
The licensee arbitrarily selected 25 gpm as the design basis leak rate for all areas, stating that the 25 gpm leak basis is consistent with GE design specifications, with the basis used at other BWRs and with the Technical Specification Improvement Program (TSIP).
The TSIP cannot be credited since the program currently has not been approved; and details relative to the GE design specifications and other BWRs was not provided for staff consideration.
The effects of the design basis leak on equipment, emergency operating procedures and personnel were not discussed (assuming prolonged operation near the design basis leak rate).
Additionally, no discussion relative to ASME Code requirements was provided.
4.
The methodology used in establishing the temperature setpoints was not described in detail, including consideration for instrument errors; the licensee did not describe to what extent industry standards were being used in establishing the temperature setpoints; and the logic used in selecting the system process conditions was not explained.
5.
The licensee stated that the radiological consequences of a coolant leak outside primary containment was analyzed, but the details of the analysis was not provided for staff review.
Principal Contributors:
J.
Tatum P. Loeser
Mr. Harold W. Keiser Pennsylvania Power
& Light Company Susquehanna Steam Electric Station Units 1 5 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 5 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 Harrisburg, Pennsylvania 17120 Mr. Jesse C. Tilton, III Allegheny Elec. Cooperative, Inc.
212 Locust Street P.O.
Box 1266 Harrisburg, Pennsylvania 17108-1266 Mr. S.
B. Ungerer Joint Generation Projects Department Atlantic Electric P.O.
Box 1500 1199 Black Horse P i ke P leasantvil le, 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 Allentown, 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 Vice President-Nuclear Operations Pennsylvania Power and Light Company 2 North Ninth Street Al 1 entown, Pennsylvania 18101