ML18029A730
| ML18029A730 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 07/22/1985 |
| From: | Vassallo D Office of Nuclear Reactor Regulation |
| To: | Parris H TENNESSEE VALLEY AUTHORITY |
| References | |
| NUDOCS 8507310286 | |
| Download: ML18029A730 (5) | |
Text
July 22, 1985 Docket Nos. 50-259/260/296 Mr. Hugh G. Parris Manager of Power Tennessee Valley Authority 500A Chestnut Street, Tower II Chattanooga, Tennessee 37401
.. DISTRIBUTION Docket File
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Dear Mr. Parris:
SUBJECT:
RESIDUAL HEAT REMOVAL SYSTEM INTERUNIT CROSSTIES Re:
Browns Ferry Nuclear Plant, Units 1, 2 and 3
By letter dated February 25, 1985, you requested changes to the Browns Ferry Technical Specifications.
The proposed changes would delete paragraphs 3.5.B. 11 through 3.5.B.13 and 4.5.B.11 through 4.5.B. 13 of Appendix A Technical Specifications.
These paragraphs specify limiting conditions for operation (LCO's) and surveillance requirements associated with the residual heat removal (RHR) system crossties between adjacent reactor units.
These crossties permit RHR pumps and heat exchangers in each unit to serve as backups for those in adjacent units.
The crossties are given credit as "unique features to aid in the mitigation of postulated pipe ruptures in addition to single active failures" (ref:
SER Supplement 6, June 28, 1974).
Eliminating these technical specifications may impact the safety margin of the Browns Ferry design.
In order for the staff to properly evaluate deletion of the RHR interunit crossties you must show that the crosstie feature is not needed to mitigate the effects of any postulated pipe break or crack during conditions for which the LCOs are applicable (i.e., reactor vessel contains irradiated fuel and is pressurized).
Accordingly, you should submit the following information:
1.
Identification and discussion of the reasons for installing the RHR interunit crossties; 2.
An accurate identification of all scenarios in which credit is taken for the RHR interunit crossties; 3.
A reanalysis of the postulated failures of the high energy lines according to the Giambusso criteria (standard Review Plan 3.6. 1 Appendix B) using the correct definition of high energy lines and a
description of any modifications necessary to meet the Giambusso criteria; and 4.
An analysis of postulated failures of moderate energy lines according to Standard Review Plan 3.6.1.
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Mr. Hugh G. Parri s This request for additional information is specific to one licensee.
The reporting and/or recordkeeping requirements contained in this letter affect fewer than ten respondents; therefore, OMB clearance is not required under P.L.96-511.
Sincerely, Original signed by/
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See next page Domenic B. Vassallo, Chief Operating Reactors Branch ¹2 Division of Licensing ORB¹2:~DL ORB¹2: gL)
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Mr. Hugh G. Parris Tennessee Valley Authority Browns Ferry Nuclear Plant Units 1, 2, and 3
CC:
H. S. Sanger, Jr., Esquire General Counsel Tennessee Valley Authority 400 Commerce Avenue E 11B 330 Knoxville, Tennessee 37902 Mr. Ron Rogers
'ennessee Valley Authority 400 Chestnut Street, Tower II Chattanooga, Tennessee 37401 Mr. Charles R. Christopher
- Chairman, Limestone County Commission Post Office Box 188
- Athens, Alabama 35611 Ira L. Meyers, M.D.
State Health Officer State Department of Public Health State Office Building Montgomery, Alabama 36130 Mr. H. N. Culver 249A HBD 400 Comnerce Avenue Tennessee Valley Authority Knoxville, Tennessee 37902 Regional Administrator, Region II U. S. Nuclear Regulatory Comnission
)01 Marietta Street, Suite 3100 Atlanta, Georgia 30303 Mr. Steven Roessler U. S. Nuclear Regulatory Commission Reactor Training Center Osborne Office Center, Suite 200 Chattanooga, Tennessee 37411 James A. Coffey Site Director, BFNP Tennessee Valley Authority Post Office Box 2000
- Decatur, Alabama 35602 Resident Inspector U. S. Nuclear Regulatory Commission Route 2, Box 31)
- Athens, Alabama 35611 Mr. Donald L. Williams, Jr.
Tennessee Valley Authority 400 West Summit Hill Drive, W10B85 Knoxville, Tennessee 37902 George Jones,
- Manager, BFNP Tennessee Valley Authority Post Office Box 2000
- Decatur, Alabama 35602