ML20072B130

Forwards Technical Justification of Single Frequency/Single Axis Testing Method,Per Ser,Suppl 3.Info Should Resolve Concerns Re Applicability of Testing Method

ML20072B130
Person / Time
Site:	Shoreham File:Long Island Lighting Company icon.png
Issue date:	06/06/1983
From:	James Smith LONG ISLAND LIGHTING CO.
To:	Harold Denton Office of Nuclear Reactor Regulation
Shared Package
ML20072B132	List: ML20072B130 ML20072B137 ML20072B147 ML20072B151
References
SNRC-902, NUDOCS 8306130326
Download: ML20072B130 (4)

Text

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! i LONG ISLAND LIGHTING COM PANY 5 dE%EP ! SHOREHAM NUCLEAR POWER STATION j g 3-a. muruma.. 3 wd P.O. BOX 618, NORTH COUNTRY ROAD e WADING RIVER. N.Y.11792 Direct Dial Number June 6, 1983 SNRC-902 Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, D.C. 20555 Technical Justification of the Single Frequency / Single Axis Testing Method Shoreham Nuclear Power Station - Unit 1 Docket No. 50-322

Reference:

1) Supplement Number 3 of the " Safety Evaluation Report Related to the Operation of the Shoreham Nuclear Power Station - Unit No. 1"

Dear Mr. Denton:

As stated in Section 3.10 of reference 1, the NRC has requested detailed technical justification for the use of the single frequency / single axis testing method for several representative components. In response, attachment 2 to this letter provides the technical justification.

LILCO believes this information should enable the NRC to resolve their equipment specific concerns regarding the applicability of the single frequency / single axis testing method for Shoreham.

If any additional information is required, please contact the undersigned.

Very truly yours, f, ,

J. L. Smith Manager, Special Projects Shoreham Nuclear Power Station RT:bc Attachment cc; J. Higgins gI All Parties Listed in Attachment 1 I FC-8935.1 8306130326 830606 PDR E

ADOCK 05000322 PDR ll)I i

ATTACHMENT 1 Lawrence Brenner, Esq. Herbert H. Brown, Esq.

Administrative Judge Lawrence Coe Lanpher, Esq.

Atomic Safety and Licensing Karla J. Letsche, Esq.

Board Panel Kirkpatrick, Lockhart, Hill U.S. Nuclear Regulatory Commission Christoper & Phillips Washington, D.C. 20555 8th Floor 1900 M Street, N.W.

Washington, D.C. 20036 Dr. Peter A. Morris Administrative Judge Atomic Safety and Licensing Mr. Marc W. Goldsmith Board Panel Energy Research Group U.S. Nuclear Regulatory Commission 4001 Totten Pond Road Wpshington, D.C. 20555 Waltham, Massachusetts 02154 Dr. James H. Carpenter MHB Technical Associates Administrative Judge 1723 Hamilton Avenue Atomic Safety and Licensing Suite K Board Panel San Jose, California 95125 U.S. Nuclear Regulatory Commission Washington, D.C. 20555 '

Stephen B. Latham, Esq.

Twomey, Latham & Shea Daniel F. Brown, Esq. .

33 West Second Street Attorney P.O. Box 398 Atomic Safety and Licensing Riverhead, New York 11901 Board Panel U.S. Nuclear Regulatory Commission Washington, D.C. 20555 Ralph Shapiro, Esq.

Cammer and Shapiro, P.C.

9 East 40th Street Bernard M. Bordenick, Esq. New York, New York 10016 David A. Repka, Esq.

U.S. Nuclear Regulatory Commission Washington, D.C. 20555 Matthew J. Kelly, Esq.

State of New York Department of Public Service

! James Dougherty Three Empire State Plaza

- 3045 Porter Street Albany, New York 12223 Washington, D.C. 20008 l

I l

1 l-o

- ATTACHMENT 2 O

SORT SER Equipment Specific Item #2 Adequacy of single frequency / single axis testing method.

The applicant is to provide detailed technical justification for the use of single frequency / single axis testing method for the following representative equipment items, or their equivalent, by 30 days prior to fuel load.

a) Local Panel Devices, B21-N055 (163Cl292) b) Transmitter, Gauge Press. - Ship Loose Devices (163C1564) c) Limitorque Actuator Recirc. Discharge Valve (B31-FO31)

Response

Single frequency / single axis testing is justified in accordance with IEEE Std. 344-1975 when certain conditions exist. If it .

can be shown that the equipment has no resonances only one resonance, or resonances are widely spaced and do not interact to reduce the fragility level, or if otherwise justified, single-frequency tests may be used to fully test the equipment.

Single frequency testing may also be used when the seismic ground motion has been filtered due to one predominant structural mode resulting in floor motion consisting of one predominant frequency.

Single-axis tests are allowed if the tests are designed to conservatively reflect the seismic event at the equipment mounting locations or if the equipment being tested can be shown to respond independently in each of the three orthogonal axes or otherwise withstand the seismic event at its mounting location.

This is the case if the coupling is zero or very low or if other justification can be provided.

Based on these guidelines, single frequency / single axis testing is justified for the selected equipment items for the reasons summarized below. Excerpts from the SQRT documentation are also attached for reference, a) Local Panel Devices, B21-N055 (163Cl292)

Since this device is being replaced, justification for panel mounted pressure switch, E21-N07 (159C4606) utilizing the same j measurement. principle is presented here.

The maximum expected accelerations at the device mounting location is 5.4g horizontal and 1.41g vertical as determined from i panel transmissibliity test data. The cutoff frequency is 60Hz.

l The device was qualified by sine' dwell testing in each of the three principal axes. The dwells were held for 30 seconds

l at 5Hz intervals between 2 and 30Hz. Acceleration levels were increased gradually at each frequency until a maximum level of 29g was reached with no evidence of failure. In addition, a resonance search between 2 and 33Hz showed no resonances. In order to extend the qualification to the cutoff frequency, a natural frequency calculation was performed. The lowest natural frequency-of the device is 99Hz which indicates that the pressure switch is rigid in the frequency range of interest.

Based on this fact and the severity of the test, single ,

frequency / single axis testing is justified in accordance with IEEE 344-1975 requirements.

b) Transmitter, Gage Press.-Ship Loose Devices (163C1564)

The maximum expected accelerations are lg horizontally and lg vertically. The cutoff frequency is 60Hz.The device was tested by a 2g sine sweep from 4 to 70Hz in all three axes. Resonant dwells of 30 seconds each were held at the natural frequencies.

The test showed that the device has two widely spaces resonances (7Hz and 50Hz) in the front to back direction with no cross-coupling. Therefore, single frequency / single axis testing is justified in accordance with IEEE 344-1975 requirements.

c) Limitorque Actuator Recire. Discharge Valve, B31-F031 The maximum expected actuator accelerations are 6.56g horizontally and .87g vertically as determined from piping dynamic analysis. The cutoff frequency is 60Hz. The actuator was qualified by a sine heat test performed in accordance with IEEE 382-1980 guidelines. An acceleration of 10g was applied in each of the three principal axes in 1/3 octave intervals over the frequency range of 2 to 100Hz. The test'also showed that the actuator has no resonances below the cutoff frequency and that no cross-coupling exists. Therefore, single frequency / single axis testing is justified in accordance with IEEE 344-1975 requirements.

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