ML17157A764

Forwards Request for Addl Info Re Proposed Tech Spec Changes to Turbine Bldg Steam Tunnel Temp Isolation Setpoint

ML17157A764
Person / Time
Site:	Susquehanna
Issue date:	07/25/1991
From:	Raleigh J Office of Nuclear Reactor Regulation
To:	Keiser H PENNSYLVANIA POWER & LIGHT CO.
References
TAC-80222, TAC-80223, NUDOCS 9108010041
Download: ML17157A764 (5)

Text

Docket Nos.

50-387 and 50-388 e

July 25, 1991 Mr. Harold W. Keiser Senior entice President-Nuclear Pennsylvania Power and Light Company 2 North Ninth Street Al 1 entown, Pennsy 1 vani a 18101

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION REGARDING THE PROPOSED TECHNICAL SPECIFICATION CHANGES TO THE TURBINE BUILDING STEAM TUNNEL TEMPERATURE ISOLATION SETPOINT, SUSQUEHANNA STEAM ELECTRIC STATION, UNITS 1

AND 2 (TAC NOS.

80222 AND 80223)

The staff has reviewed your April 18, 1991, request for changes to the technical specifications related to the turbine building steam tunnel temperature isolation setpoint for Susquehanna Steam Electric Station (SSES),

Units 1 and 2.

I Based on this review, the staff has developed the enclosed request for additional information.

Please provide the requested information within 30 days of your receipt of this letter.

If there are any questions regarding this matter, please call me on (301) 492-1447.

This requirement affects 9 or fewer 'respondents and, therefore, is not subject to Office of Management and Budget Review under P.L.96-511.

S incerely,

/s/

James J. Raleigh, Acting Project Manager Project Directorate I-2 Division Of Reactor Projects - I/II Office of Nuclear Reactor Regulation

Enclosure:

Request for Additional Information cc w/enclosure:

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7 Docket Nos.

50-387 and 50-388 UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555 July 25, 1991 ter. Harold M. Keiser Senior Vice President-Nuclear Pennsylvania Power and Light Company 2 North Ninth Street Allentown, Pennsylvania 18101

SUBJECT:

REQUEST FOR ADDITIONAL INFORHATION REGARDING THE PROPOSED TECHNICAL SPECIFICATION CHANGES TO THE TURBINE BUILDING STEAN TUNNEL TEMPERATURE ISOLATION SETPOINT, SUSQUEHANNA STEAN ELECTRIC STATION, UNITS 1 AND 2 (TAC NOS. 80222 AND 80223)

The staff has reviewed your April 18, 1991, request for changes to the

. technical specifications related to the turbine building steam tunnel temperature isolation setpoint for Susquehanna Steam Electric Station (SSES),

Units 1 and 2.

Based on this review, the staff has developed the enclosed request for additional information.

Please provide the requested information within 30 days of your receipt of this letter.

If there are any questions regarding this matter, please call me on (301) 492-1447.

This requirement affects 9 or fewer respondents and, therefore, is not subject to Office of Management and Budget Review under P.L.96-511.

S incerely,

Enclosure:

Request for Additional Information cc w/enclosure:

See next page James J. Raleigh, Acting Project Iianager Project Directorate I-2 Division Of Reactor Projects - I/II Office of Nuclear Reactor Regulation

Nr. Harold W. Keiser Pennsylvania Power

& Light Company Susquehanna Steam Electric Station Units 1

& 2 CC:

Jay Si lberg, 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 Nr. J.

N. Kenny Licensing Group Supervisor Pennsylvania Power

& Light Company 2 North Ninth Street Allentown, Pennsylvania 18101 f1r. Scott Barber Senior Resident Inspector U. S. Nuclear Regulatory Commission P.O.

Box 35 Berwick, Pennsylvania 18603-0035 Nr. Thomas N. Gerusky, Director

, Bureau of Radiation Protection Resources Commonwealth of Pennsylvania P. 0.

Box 2063 Harr isburg, Pennsylvania 17120 fir. Jesse C. Tilton, III Allegheny Elec. Cooperative, Inc.

212 Locust Street P.O.

Box 1266 Harrisburg, Pennsylvania 17108-1266 Nr. S.

B. Ungerer Joint Generation Projects Department At1 anti c E lectri c 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 tlr. Harold G. Stanley Superintendent of Plant Susquehanna Steam Electric Station Pennsylvania Power and Light Company 2 North Ninth Street Allentown, Pennsylvania 18101 Hr. Herbert D. Woodeshick Special Office of the President Pennsylvania Power and Light Company 1009 Fowles Avenue Berwick, Pennsylvania 18603 t1r. Robert G.

Byram Vice President-Nuclear Operations Pennsylvania Power and Light Company 2 North Ninth Street Allentown, Pennsylvania 18101

Enclosure RE(UEST FOR ADDITIONAL INFORMATION REGARDING PROPOSED REVISIONS TO THE SUSquEHANNA STEAM ELECTRIC STATION TECHNICAL SPECIFICATION RE(UIREMENTS RELATED TO THE TURBINE BUILDING STEAM TUNNEL TEMPERATURE ISOLATION SETPOINT DOCKET NOS. 50-387 AND 50-388 Pennsylvania Power and Light (PP&L or the licensee) requested NRC review and approval of a proposed change to the Technical Specification requirements related to the turbine building steam tunnel temperature isolation setpoint for Susquehanna Steam Electric Station (SSES),

Unit Nos.

1 and 2 by letter of April 18, 1991.

The staff has completed a preliminary review of the licensee's request and based on that review, the staff has identified the following comments and questions for consideration.

The licensee is requested to revise its submittal accordingly.

1.

For completeness, the submittal should make reference to any previous discussions with the staff pertaining to this matter and should include a

summary of the major points of discussion and any conclusions that were reached.

2.

It is not clear why the current margin of 30 degrees is not adequate.

Explain.

3.

Details of the turbine building steam tunnel temperature analysis must be provided for staff review.

Detailed information related to the application of computer codes should also be provided unless the staff has previously reviewed and approved the code for the specific application in question.

In any case, all assumptions used in the analysis should be identified and fully explained.

4.

The licensing basis assumes that leaks from the reactor coolant system (RCS) will be isolated in a short period of time.

The staff has generally accepted RCS leak r ates of up to 25 gpm outside containment for satisfying this condition.

For leak rates that exceed the 25 gpm threshold, a

detailed analysis of the radiological consequences of a coolant leak outside primary containment must be completed and submitted for staff review.

5.

The methodology used in establishing the temperature setpoints must be described in detail, including consideration for instrument errors.

The description should discuss to what extent industry standards were used in establishing the temperature setpoints.

6.

Current operating problems may be indicative of degraded air conditioning/

ventilation performance.

What assurance is there that this is not a contributing factor?

7.

Aside from the automatic isolation function, the ASME Code states certain requirements relative to degraded components and piping.

How is compliance with the ASME Code assured when a crack develops that does not exceed the criteria for automatic isolation?

8.

What effect would the increased temperature setpoint have on environmental qualification of equipment?

Explain.

Principal contributor:

J.

Tatum