ML20132B985
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UNITED STATES y "' -
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NUCLEAR REGULATORY COMMISSION
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Elinor G. Adensam, Chief Licensing Branch # 4 Division of Licensing FR0l;:
Robert J. Bosnak, Chief Mechanical Engineering Branch Division of Engineering
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<.. EVALUATION OF PROPOSED SNUSBER TECHNICAL SPECIFICATION -
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CHANGES FOR GRAND GULF, UNIT 1 (TAC l.'0S. 52523 AND 54603)
References:
- 1. Letter form Dale to Denton, AECM-83/0641, dated October 7, 1983
- 2. Letter from McGaughy to.Denton, AECM-84/0179, dated March-29, 1984 The Mechanical Engineering Branch has reviewed the information in Reference 1 and Part 1 of Reference 2 relative to proposed-snubber Technical Specification changes for Grand Gulf, Unit 1, Our evaluation,
. which fir.ds these requests to be acceptable, is attached. This completes the "EB action for TAC Nos. 52523 and 54603.
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Robert J. Bosnak, Chief Mechanical Engineering Branch Divisicn of Er.gineering
Attachment:
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R. Vollmer, DE
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J. Knight, DE D. Houston,.DL D.Brinkman,DL{
Kintner, DL H. Brammer, DE H. Shaw, DE CONTACT:
H. Shaw, MEB, DE X 24420 e
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I l'ECFAf:ICAL E!!GINEERIliG BRANCH EVALUATION OF PROPOSED Sf1UEBER TECHNICAL J
SPECIFICATION CHANGES, GRAl40 GULF, Ohli 1 l TAC i;05. 52523 ana 54603 i
The staff has reviewed information submitted by the flississippi Power and Light Company in letters AECit-83/0641, dated Octcber 7, 1983 and AECM-84/0179 (Part 1) dated March 29, 1984.
Both submittals are proposed amendments to the Operating License No. NPF-13 for the Grand Gulf fluclear Station Unit I relative to revisions of Table 3.7.4-2,
" Listing of Safety - Related Mechanical Snubbers" in the Technical Specifications for the Grand Gulf 11uclear Station Unit 1.
The reason for the requested revisions and the affected number of
~....-snubbers in-Table. 3.7.4-2 are summari od as :follows: s e-
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- 1. Addition of snubbers that were inadvertently left off the table.
Seventeen snubbers viere edded to the table for this reason.
In addi-tion, elevation locations were added to seven snubbers presently in the table.
- 2. Deletion of three snubbers that were redundantly listed in the table.
- 3. Redesignation of one snubber.
One snubber was superseded by the addition of two of the snubbers which were added to the table in 1 above.
- 4. Deletion of snubbers that were non-existent in,the plant.
Two snubbers were deleted as they were never installed.
- 5. p oographical errors.
Eight changes were made to correct typographical errors. They do not reflect the addition or deletion of snubbers.
- 6. Addition of Section 2, "Non-0 Mechanical Snubbers" to the table.
Proper modifications are made to accommodate the addition of a Section 2 to the table. This section contains snubbers on non-safety-related piping which were included in the stress analysis calculations of adjacent safety-related piping.
- 7. Elimination of redundant listing of snubbers from the table.
This is done by listing only one number and using parenthesis to indicate the number of snubbers for the same listina.
- 8. Addition of one snubber as a result of design change.
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One snubber was dded to the table as : recul: cf t-ign. change which installs a bypass line arnund the reactor c0re isolation i
cooling turbine steam shutoff valve to limit ficw duri.99 automatic starts and thus prevent turbine overspeed trips.
The new snubber was added to the new bypass line to provide the support necessary to meet system design requirements.
With the exception of Item 8 abcve, the staff has determined that the proposed revisions are administrative in nature and will be helpful to
.i implement.the surveillance requirements on snubbers.
The proposed revisions, including Item 8 do not reduce safety margins in the plant design and will not increase the probability.or. censequences of either a t -
a new or a previously analyzed accident. Therefore, the proposed l
revisions are acceptable.
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