ML20134G509
| ML20134G509 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 02/05/1997 |
| From: | Abney T TENNESSEE VALLEY AUTHORITY |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| Shared Package | |
| ML20134G513 | List: |
| References | |
| RTR-NUREG-1433 TVA-BFN-TS-388, NUDOCS 9702100434 | |
| Download: ML20134G509 (4) | |
Text
1 o
Tennessee Valley Authority, Post offee Box 2000, Decatur, Alabarna 35609-2000 l
February 5, 1997 1
TVA-BEN-TS-388 U.S.
Nuclear Regulatory Commission ATTN:
Document Control Desk Washington, D.C.
20555 Gentlemen:
In the Matter of
)
Docket Nos. 50-259 Tennessee Valley Authority
)
50-260 50-296 BROWNS FERRY NUCLEAR PLANT (BFN) - UNITS 1, 2, AND 3 -
REVISION TO TECHNICAL SPECIFICATION (TS) BASES (TS-388)
The purpose of this letter is to inform NRC of changes TVA has made to the BFN Units 1, 2,
and 3 TS Bases.
TVA revised Bases Section 3.7.A/4.7.A, " Primary Containment," to delete wording regarding maintaining the drywell to suppression chamber differential pressure constant for the duration of the drywell to suppression chamber leak test to allow performance using an acceptable alternative testing
)
methodology.
Although the methodology discussed in the bases provides suitable data for verifying that the leakage
)
j is within limits, it requires makeup to the drywell during the test to maintain the pressure differential constant.
j Equivalent results can be achieved by establishing an n)[J ')O j-l initial differential pressure and allowing it to decay during the test and ensuring the final differential pressure is greater than one psi.
This methodology does not require makeup and would allow the test to be conducted witn minimal resources.
Eliminating makeup for this test is consistent with the methodology described in NUREG-1433, BWR/4 Standard Technical Specifications.
9702100434 970205 PDR ADOCK 05000259 P
~
bM@97EMW i
U.S. Nuclear Regulatory Commission l
Page 2 l
February 5, 1997 1 to this letter provides the description and reason for these changes. contains copies of the appropriate TS Bases pages from Unit 1, 2,
and 3 marked-l up to show the changes. forwards the revised TS Bases pages for Units 1, 2,
and 3.
There are no new commitments contained in this letter.
If you have any questions, please contact me at (205) 729-2636.
j Spice ely l
T.
E. Abnt Manager of Li ensing and Indust y Affai cc (Enclosures):
Mr. Johnny Black, Chairman Limestone County Commission 310 West Washington Street Athens, Alabama 35611 Mr. Mark S.
Lesser, Branch Chief U.S.
Nuclcar Regulatory Commission Region II 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323 NRC Resident Inspector Browns Ferry Nuclear Plant 10833 Shaw Boad Athens, Alabama 35611 Mr. Joseph F. Williams, Project Manager U.S.
Nuclear Regulatory Commission One White Flint, North 11555 Rockville Pike Rockville, Maryland 20852 Dr. Donald E. Williumson State Health Officer Alabama State Department of Public Health 434 Monroe Street i
Montgomery, 'laoama 36130-3017 l
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t t
ENCLOSURE 1 TENNESSEE VALLEY AUTHORITY BROWNS FERRY NUCLEAR PLANT (BFN)
UNITS 1, 2, AND 3 REVISION TO TECHNICAL SPECIFICATION (TS) BASES (TS-388)
DESCRIPTION OF AND REASON FOR CHANGES I.
DESCRIPTION OF THE CHANGES l
TVA revised Bases Section.3.7.A/4.7.A, " Primary Containment," to delete wording regarding maintaining l
the dry.iell to suppression chamber differential pressure constant for the duration of the drywell to suppression chamber leak test.
The specific changes are described below.
1.
Unit 1 Bases Section 3.7.A, page 3.7/4.7-29.
Delete'the words "and held constant" from the end of the second sentence in the last paragraph on the page.
The revised sentence will read as follows:
...The drywell pressure will be increased by at least one psi with respect to the suppression chamber pressure.
2.
Unit 2 Bacc: Section 3.7.A, page 3.7/4.7-29.
)
Delete the words "and held constant" from the end of j
the second sentence in the last paragraph on the page.
The revised sentence will read as follows:
...The drywell pressure will be increased by at least one psi with respect to the suppression chamber pressure.
3.
Unit 3 Bases Section 3.7.A, page 3.7/4.7-28.
Delete the words "and held constant" from the end of j
the second sentence in the last paragraph on the page.
The revised senten;e will read as follows:
...The drywell pressure will be increased by at least one psi with respect to the suppression chamber pressure.
II.
REASON FOR THE CHANGES TVA revised Bases Section 3.7.A/4.7.A, " Primary Containment," to delete wording regarding maintaining the drywell to suppression chamber differential pressure constant for the duration of the drywell to suppression chamber leak test to allow performance using an acceptable alternative testing methodology.
Although the methodology discussed in the bases provides suitable data for verifying that the leakage is within limits, it requires makeup to the drywell during the test to maintain the pressure differential I
constant.
Equivalent results can be achieved by establishing an initial differential pressure and allowing it to decay during the test and ensuring the final differential pressure is greater than one psi.
i This methodology does not require makeup and would allow the test to be conducted with minimal resources.
Eliminating makeup for this test is consistent with the methodology described in NUREG-1433, BWR/4 Standard Technical Specifications.
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