ML20096A395

Forwards Response to 840724 Request for Addl Info Re Structural Aspects of plant-unique Analysis Rept for Torus Attached Piping

ML20096A395
Person / Time
Site:	FitzPatrick
Issue date:	08/24/1984
From:	Bayne J POWER AUTHORITY OF THE STATE OF NEW YORK (NEW YORK
To:	Vassallo D Office of Nuclear Reactor Regulation
References
JPN-84-56, NUDOCS 8408310095
Download: ML20096A395 (5)

Text

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August 24, 1984 JPN-84-56 Director of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, D.C.

20555 Attention:-

Mr. Domenic B. Vassallo, Chief Operating Reactors Branch No. 2 Division of Licensing

Subject:

James A.

FitzPatrick Nuclear Power Plant Docket No. 50-333 Mark I Program

Reference:

1.

NRC letter, D.

B. Vassallo to J. P.

Bayne, dated July 24, 1984.

Dear Sir:

In Reference 1 the NRC transmitted a request for additional ir formation on the structural aspects of the FitzPatrick plant unique analysis report for torus attached piping.

Attachment I provides the response as requested.

If you have any questions concerning this information, please contact Mr. J. A. Gray, Jr. of my staff.

Very truly yours, J

ayhe.

Irst execu ive Vice President Chief Operations Officer cc:

Office of the Resident Inspector U. S. Nuclear Regulatory Commission P.

O. Box 136 Lycoming, New York 13093 8408310095 840824 PDR ADOCK 05000333 f

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'JAFNPP Torus Program l

LResponse.to: Review Questions on1TES Report

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TR-5321-2, PUARLfor Torus Attached Piping 8

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In Section 2.4.2 of - the PUA Report, TR-5321-2 (2), some condi-tionsfareclisted that would:be evaluated in case the conserva-tive condition for SRV pipe stress could not be met. Provide the-(reason for considering.the-first of these case:, and: verify the

= value and derivation of; the allowable stress associated : with this case.

Response. The first two ' alternate cases -listed in paragraph

' 2.4.2 are similarfexcept the first includes an OBE seismic event

-and the.second an-SSE. !They represent cases 14 and 15..in Table 1.

It;was judged necessary to consider. both of these as separate cases'for-FitzPatrick-.because the FSAR defines' separate spectra 4

for 08E and SSE.

That is,' they~ are not simple multiples as-in most -other plants (see paragraph 2.2.5).

The fact that the

spectra are different and that SSE has higher damping.that.0BE (two percent 'versus 'one per' cent) made2 f t appear. possible that 3

responsesLin small frequency bands could be higher.for 08E than

SSE. -The first alternate load case,containing.0BE, was_there-

. fore run to cover-this possibility.

3 The allowable stress for this case is shown in paragraph 2.4.2 as 1.85p This is a typographical error and should have read 1.8 S '-

h in accordance with fo,otnote 3 to Table 1 in the TAP report.

. Item 2-

~With respect to Section 3.3.5 of the PUA. Report, TR-5321-2 (2),

indicate whether the 10 percent rule of Section 6.2d (1) was used to exempt any branch piping from analysis. If so.-provide calcu-lations demonstrating conformance to this rule.

Also, indicate.

why, in the analysis of flexible branch piping, a displacement equal to the' total torus attached piping motion as the connec--

tion point was used for:the FitzPatrick plant, whereas TES used

-twice the torus attached piping motion for other plants.

~

. Response The 10 percent rule was not used to exempt any branch

. piping from analysis.

The analysis of the flexible branch piping for FitzPatrick plant was-performed using twice the torus attached piping motion as it' was for the other plants. The report will be revised to correct thiscin the final issue.-

Item!3

.WithLrespect to Section 3.4.1 of the PUA Report, TR-5321-2 (2),

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indicate whether seismic loads were considered in load cases 25 and 151(Table 1).

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e JAFNPP Torus Program Response to Reviev Questions on TES Report TR-5321-2, PUAR for Torus Attached Piping Response The larger of the Oi.E or SSE seismic stress was in-cluded in the evaluation of load cases 25 and 15 (Table 1). Both seismic events were considered for the reasons discussed in Item 1 above.

Item 4 With respect to Tables 3-1 and 3-2 of the PUA Report, TR-5321-2 (2), indicate whether the lines in each of the following sets are identical and explain why only one result appears for each set.

X-202A and X-202F, X-202B and X-202G, X-210A and X-211A, X-210B

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and X-2118, X-213A and X-213B, and A-206A, B, C, and D.

Response Lines X-202A and F are connected by a comon system in a single analytical model. A single analysis was performed and 4

only the maximum stress results are reported.

Lines X-202B and G are similar in configuration and in analysis l-method to that used in X-202A and F.

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Lines X-210A and X-211A are connected by a cross-over system in a i~

single analytical model.

A single analysis was performed and only the maximum stress results are reported.

Lines X-210B and X-211B are similar in configuration and in l-analysis method to that used in X-210A and X-211A.

Lines X-213A and B are identical and only the maximum stress results of one system are reported.

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Lir.es X-206A, B, C, and D are two similar systems where X-206A and " are connected by a comon piping system and X-206C and D are identical to X-206A and B.

Only the maximum stress results from one system are reported.

Item 5 With respect to Section 3.4.6 of the PUA Report, TR-5321-2 (2),

I provide the analytical results of the fatigue evaluation of the b

torus shell penetrations.

Response The usage factor "u" is used to determine the fatigue acceptability.

This is calculated as Maximum number of cycles possible Number of allowable cycles at S t

a The allowable number of cycles at S is calculated according to ASME Section III, NE-3221.5, and uses Table I-9 in the Appendices.

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V JAFNPP Torus Prograa J'

Response to Review Questions on TES Report-TR-5321-2, PUAR for Torus

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Attached Piping i

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The maximum number of full stress cycles was conservatively 1

taken as 10,000 as discussed in the PUAR (2), paragraph 3.4.6.

(The actual number of full stress cycles is actually. about 1,000.)

.; 8ased on a.1 assumed 10,000 full stress cycles, the three highest usage factors for lar e bore pipe penetrations (as tabulated in Table 3-6 of the PUAR are:

Large Bore Penetration Usage Factors Cycles Penetration Assumed Allowable Usage Factor X-212 10,000 12,000 0.83 X-225A 10,000 21,000 0.48 j

X-2108 10,000 23,200 0.43 -

All small bore penetrations have usage factors less than 0.01.

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