ML17146B041
| ML17146B041 | |
| Person / Time | |
|---|---|
| Site: | Susquehanna  |
| Issue date: | 11/20/1987 |
| From: | Thadani M Office of Nuclear Reactor Regulation |
| To: | Keiser H PENNSYLVANIA POWER & LIGHT CO. |
| References | |
| NUDOCS 8711250260 | |
| Download: ML17146B041 (6) | |
Text
November 20, 1987 Docket No. 50-388 Mr. Harold W. Keiser Vice President Nuclear Operations Pennsylvania Power and Light Company 2 North Ninth Street Allentown, PA 18101
Dear Mr. Keiser:
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION RE:
Susquehanna Steam Electric Station (SSES),
Unit 2 We have reviewed your request dated June 30, 1987 for SSES Unit 2 Technical Specification changes to permit indefinite operation of the Unit with single operating recirculation loop.
Our review indicates a need for additional information before we can complete the review.
Please provide answers to the enclosed set of questions within 30 days from the receipt of this request so that we can complete our action on your request in a timely fashion.
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UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 November 20, 1987 Docket No. 50-388 Mr. Harold M. Keiser Vice President Nuclear Operations Pennsylvania Power and. Light Company 2 North Ninth Street Allentown, PA 18101
Dear Mr. Keiser:
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION RE:
Susquehanna Steam Electric Station (SSES),
Unit 2 Me have reviewed your request dated June 30, 1987 for SSES Unit 2 Technical Specification changes to permit indefinite operation of the Unit with single operating recirculation loop.
Our review indicates a need for additional information before we can complete the review.
Please provide answers to the enclosed set of questions within 30 days from the receipt of this request so that we can complete our action on your request in a timely fashion.
Sincerely, Enclosure cc:
See next page Mohan C. Thadani, Project Manager Project Directorate I-2 Division of Reactor Projects I/II
Mr. Harold W. Keiser Pennsylvania Power
& Light Company Susquehanna Steam Electric Station Units 1 f 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, Pennsyl vani a 18101 Mr. E. A. Heckman Licensing Group Supervisor Pennsylvania Power 5 Light Company 2 North Ninth Street Allentown, Pennsylvania 18101 Mr. Loren Plisco Resident Inspector P.O.
Box 52 Shickshinny, Pennsylvania 18655 Mr. R. J.
Benich Services Project Manager General Electric Company 1000 First Avenue King of Prussia, Pennsylvania 19406 Mr. Thomas M. Gerusky, Director Bureau of Radiation Protection Resources Commonwealth of Pennsylvania P. 0.
Box 2063 Harrisburg, Pennsylvania 17120 Robert W. Alder, Esquire Office of Attorney General P.O.
Box 2357 Harrisburg, Pennsylvania 17120 Mr. Jesse C. Tilton, III Allegheny Elec. Coorperative, Inc.
212 Locust Street P.O.
Box 1266 Harrisburg, Pennsylvania 17108-1266 Mr.
W. H. Hirst, Manager Joint Generation Projects Department Atlantic Electric P.O.
Box 1500 1199 Black Horse Pike Pleasantville, New Jersey 08232 Regional Administrator, Region I U.S. Nuclea~ Regulatory Commission 631 Park Avenue King of Prussia, Pennsylvania 19406
RE UEST FOR ADDITIONAL INFORMATION FOR SUS UEHANNA UNIT 02 SLO 1.
The limiting event which determines operating limit HCPR seems to be recirculation pump seizure accident (0.35 BCPR for the GE 8x8 fuel).
Submit the analysis of the recirculation pump seizure accident for the GE fuel. It is stated that PAL did not take credit for the recirculation pump seizure accident analysis performed by Advanced Nuclear Fuels corporation (ANF).
Describe why credit is not taken for this analysis in determining the operating limit HCPR.
2.
In the Susquehanna Unit 2, Cycle 2 single loop operation analysis performed by Exxon, (XN-NF-86-146, November 1986),
peak calculated pressure for different transients is not given.
Submit the calculated peak pressure for the transients analyzed for SLO.
3.
In the Susquehanna Unit 2, cycle 2
LOCA analysis for SLO performed by EXXON (XN-NF-86-125 November 1986), the following statement is given in the introduction section, "A previous analysis for single loop operation by the NSSS vendor made simplifying conservative assumptions.
These conservative assumptions resulted in a reduction in the HAPLHGR limit for single loop operation.
The analysis reported herein was made without such simplifying assumptions."
Describe in detail which simplifying assumptions ANF decided to delete and the basis for their deletions.
Also describe which assumptions ANF used in the SLO LOCA analysis.
4.
Only a limited break spectrum analysis was performed to confirm that the two-loop limiting break remained applicable for SLO.
Justify the use of a limited break spectrum analysis instead of the complete break spectrum analysis.
S.
In the report XN-NF-86-125, Section 3.2, Appendix-K spray heat transfer coefficients are used for the spray cooling period.
Justify the use of these heat transfer coefficients since they are not approved for 9x9 fuel being used in SSES 82, Cycle 2.
6.
In XN-NF-86-146 SSES Unit 82, Cycle2 ANF SLO analysis, core flow measurement uncertainty during SLO is not addressed.
It is stated that the procedure established by GE to correct for the back flow through the inactive jet pumps is also applicable for a core with ANF fuel.
Describe in detail the applicability for ANF fuel, 7.
The Rod Mithdrawal Error {RME) transient is not analyzed for ANF fuel.
Describe in detail the insignificance of this transient, for SLO opera/ion.