ML20063B420

Forwards Mechanical Snubber Qualification Test Repts for Pacific Scientific Co Models PSA 1/4 - PSA 100,as Requested by Nrc.Only qualitative-type Actuation Tests Planned at Plants,Beginning W/Browns Ferry 2 & Sequoyah 1

ML20063B420
Person / Time
Site:	Browns Ferry, Sequoyah, 05000000
Issue date:	08/18/1982
From:	Mills L TENNESSEE VALLEY AUTHORITY
To:	Harold Denton Office of Nuclear Reactor Regulation
Shared Package
ML18025B853	List: ML18025B852 ML18025B854 ML18025B855 ML18025B856 ML18025B857 ML18025B858 ML18025B859 ML18025B860 ML18025B861 ML18025B862 ML18025B865 ML18025B867 ML18025B868 ML20063B420
References
NUDOCS 8208250376
Download: ML20063B420 (2)

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. TEN'NESSEE VALLEY AUTHORITY .

CH ATTANOOGA, TENNESSEE 37401 400 Chestnut Street Tower II August 18, 1762 Mr. Harold R. Denton, Director Office of Nuolear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, DC 20555

Dear Mr. Denton:

In the Matter of ) Docket Nos. 50-327 Tennessee Valley Authority ) 50-328 50-259 50-260 50-296 As requested by Horace Shaw, NRC, in a meetin,t with TVA. enclosed are qualification test reports submitted by Pacific Scientific Company (PSC) for mechanical snubber qualifiention testa performed to the C. F.11raun Specification 400-20. The reporta are identified as follows:

Report No. 312e Model No. Sarial Non. Paport Data TR 839 PSA 1/4 1801104-05 10061 and 10062 12/12/79 TR 840 PSA 1/2 1801104-07 4135 and 6461 I?/12/79 TR 841 POA 1 1801102-05 7707 nnd 7708 1/21/80 TR 842 PSA 3 1801106-05 11731 and 11732 1/22/80 TR 843 POA 10 1801103-07 5921 and 5922 1/25/80 TR 845 PSA 35 1801112-11 5192 nnd 5193 2/07/80 TR f46 PSA 100 1801119-11 709 and 710 5/12/80 Includad with the reporta is a copy of the March 18, 1982 letter from Jamas Clauner, PSC, transmitting the reporta and portions of the C. F. Drnun Spectrication 400-20.

, We believe that qualitative tanting for actuation of the anubbars, PSC Modela PSA-1/4 througn rnA 100, in nufflotant to verify the functional operabtitty of thasa nnubbers. This ballar in bane <1 on the following:

1. The suceansful completion of tha qualifiention tanting of two production snubbern of emnh ntra, P3A-1/4 through PSA-100

2. The damlan of the nnubbar.

3. "On tha TheM4rnhifi.1992lattarfromJamasit.Olmonarwhichstates!ttative beats of thans reportg. there in juntifination for t'olng qun tanting in 11au of quantitativa tanting for the acontaration manalttytty ant friotton of tha nnubbers."

$0}I 4 The maamuromant anl aveluetton of the drag force of snubbarn in nervica.

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Mr. Harold R. Denton, Director August 18, 1982 l

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We therefore, plan to perform only qualitative type actuation tests of the PSC anubbers at TVA nuclear plants begining with the Browns Ferry Nuclear Plant unit 2, cycle 4 refueling outage, and the next refueling outage at our Sequoyah Nuclear Plant, unit 1, cycle 2.

If you have any questions regarding this subject, please call Jerry Wills at FTS 858-2683.

Very truly yours, TENNESSEE VALLEY AUTHORITY 1 ,

L. M. Mills, D nager Nuclear Licensing Sworn to and subscribed before me this / day of 982.

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h Enclosure oct U.S. Nuclear Regulatory Commission Region II Attnt Mr. James P. O'Reilly, Regional Administrator 101 Marietta Street, Suite 3100 Atlanta, Georgia 30303

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Kin Tech Division W Pa CIFIC g SCIENTIFIC 18 March 19(2 Mr. Dan Chapcian TENNESSE VALI.EY AUTliORITY Nuclear Maintainance Branch 1240 CST 2 Chattanooga, Tenn. 37401

Dear Mr. Chapman:

Enclosed with this letter are copies of the Qualification Test Reports covering all si7es of our snubbers.

These reports, in essence, state that two randomly selected sampics from production of each size snubber were tested by exposing them to 5,000 full load cycles at various frequencies as well as abnormal environments.

Before, during and af ter the tests, the units functioned satisfactorily.

On the basis of these reports, there is justification for doing qualitative testing in lieu of quantitative testing for the acceleration sensitivity and friction of the snubber.

l It is my personal opinion that the NRC 8101 service test is an adequate test to give acceptable assurance that the snubber is functional and satisfactcry for continued service.

I trust this inforcation vill be of use to you.

Sincerely, PACIFIC SCIENTIFIC

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Kin-Tech DivisioV- /

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, ,' .80 J est Glauser ice President Engineering 3

11r Enclosure cc: J. Dowdy R. Franseth 1346 S. State College Bouleyard, Anaheim, California 92803,(714) 774 5217 TELEX 65 5421