ML20069P602
| ML20069P602 | |
| Person / Time | |
|---|---|
| Site: | Seabrook  |
| Issue date: | 12/03/1982 |
| From: | Devincentis J PUBLIC SERVICE CO. OF NEW HAMPSHIRE, YANKEE ATOMIC ELECTRIC CO. |
| To: | Knighton G Office of Nuclear Reactor Regulation |
| References | |
| SBN-401, NUDOCS 8212080190 | |
| Download: ML20069P602 (4) | |
Text
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PUEBLIC BERVICE smnOM STATION
%m Companyof New: :.phure 1671 Worcester Road Framinoham, Monochusetts 01701 (617) - 872 8100 December 3, 1982 SBN-401 T.F.
B7.1.2 United States Nuclear Regulatory Commission Washington, D. C.
20555 Attention:
Mr. George W. Knighton, Chief Licensing Branch No. 3 Division of Licensing
References:
(a) Construction Permits CPPR-135 and CPPR-136, Docket Nos. 50-441 and 50-444 (b) USNRC Letter, dated June 18, 1982, " Request for Additional Information - Mechanical Engineering Branch,"
F. J. Miraglia to W. C. Tallman
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(c) PSNH Letter, dated September 30, 1982, " Response to 210 Series RAIsi Mechanical Engineering Branch,"
J.
DeVincentis to Ms. Janice B. Kerrigan (SBN-337)
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Subject:
Response to Mechanical Engineering Branch RAI 210.89 Dear Sir Enclosed please find our response to Mechanical Engineering Branch RAI 210.89, which was inadvertently omitted from our Reference (c) response to your Requests for Additional Information forwarded in Reference (b).
Very tntly yours, YANKEE ATOMIC ELECTRIC COMPANY L L4 J. DeVincentit.
Project Manager RAM /fsf f
o go cc Atomic Safety and Licensing Board 8212000190 821203 PDR ADOCK 05000443 A
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ASLB SERVICE LIST 4
Philip Ahrens, Esquire Assistant Attorney General, Department of the Attorney j
y General Augusta, ME 04333 s
Representative Beverly Hollingvorth Coastal Chamber of Commerce 209 Winnacunnet Road
'l Hampton, NH 03842 3
William S. Jordan, III, Esquite 2
Harmon & Weiss 1725 I Street, N.W.
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Suite 506 r
l Washing toa, DC 20006 t
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E. Tupper Kinder, Esquire
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s Assistent Attorney General j
Office of the At.torney General 208 Stnte House Annex Conc <.rd, NH 03301 4
i Robert A. Backus, Esquire 116 Lowell Street P.O. Box 516 Manchester, NH 03105 Edward J. McDermott, Esquire i'
Sanders and McDermott Professional Association
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408 Lafayette Road Hampton, NH 03842 4
i Jo Ann Shotwell, Esquire Assistant Attorney General Environmental Protection dureau
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Department of the Attorney General One Ashburton Place, 19th Floor Boston, MA 02108 l
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210.89 Evaluation of Tees or Branch Connections in Class 1 Piping 7
i The analysis of tees or branch connections as required by NB-3650 of the Code is a relatively complex process; the documents received to date do not give sufficient J? rail to enable us to say s
that Code requirements have been or will be met.
Please furnish a detailed description of how this analysis has been (or will be) performed, along with examples involving:
(a) An ANS1 816.9 tee (b) A Branch Connection per NB-3643 RESPONShe NSSS (m,
. A thecmal transient heac transfer analysis was performed for 3ach Ac?SI B16.9 tee on all the Class 1 auxiliary lines. All norma 1, upset, and test conditions identified in FSAR Section
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1.9.1 were onsidered.
1 Th<i tharmal quantitics aT, AT, endlot T - *( b Tle 1
2 3 a b
as defined in NB-3650, were calculated on a time-history basis,
':s' ng a one-dimensional finite dif ference method for forced and free cenvection heat transfer analysis. Stresses due to these
,quancities were calculated for each time increment using the simplified methode of Nh-3550 of Cae Code.
A uinf mum of two thermal expansion analynes, corresponding to the maximum sud tha minimum pipe wall average temperatures or fluid temperatures, were costvervatively perforned to generate the maximum and minimum noment sets for stress and f atigue evaluations. Thermal anchor movements were included in these analysea. The combination of stresses due to these moments and the; associated peak transient stresses with the other require.d load sets produced conservative stress ranges and fatig2e usage factors.
5t/ess evaluation of sockolet connections (half-couplings
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(b)_ use t on Class 1 auxiliary piping systems) were performed in accordance with the simplified methods described in the Code (NE-3650). For primary stress evaluation, stress indices for s soikolet connections were conservatively considered to be the sane as those for a branch connection.
4 for the fatigue evaluation, finite element heat transfer and i
stress analyses for various thermal transient loadings were l
performed with conservative fatigue strength reduction factofs. Finite element thermal transient stresses were l
coabined with pressure and external moment stresses to l
evaluat'e equations (10) through (14) of the ASME Code for sockolet connections.
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t p
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BOP ASME III, Class 1 piping systems comply with NB-3650. The determination of tee and branch moments is performed according to the requirements of Note 5 of Table NB-3683.2-1.
For static piping system loadings, run and branch moments, Mir and Mib respectively, are computed in a straightforward manner in which the conditions of equilibrium are satisfied. Thus, the determination of M is direct. Furthermore, since all dynamic r
seismic analyses are performed utilizing response spectra techniques, the determination of M is conducted on a modal r
basis wherein each mode yields a consistent set of moments with the proper signs. The appropriate combination (i.e., grouping
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method) of the modal M values is then used to obtain results r
for each of the three earthquake directions.
The thermal quantities, A T,6T, and } ' a a -Ob b!
i 2
T T
for each applicable thermel transient are determined when required by the ADLPIPE program and are included in the appropriate equations of NB-3650.
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NOTE: ASME III, Class 1 piping of one inch nominal pipe size or less is qualified according to the requirements of Paragraph NB-3630(d)(1) where Subsection NC is stipulated.
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