ML20214Q100

Summary of 861125 Meeting W/Applicant to Discuss Thermal Lag Analysis Used to Qualify Equipment to Containment worst-case Temp Profile.Equipment Analyzed Included Limitorque Valve Operators,Namco Limit Switches & Fan Cooler Motors

ML20214Q100
Person / Time
Site:	Vogtle
Issue date:	12/01/1986
From:	Mark Miller Office of Nuclear Reactor Regulation
To:	Office of Nuclear Reactor Regulation
References
NUDOCS 8612040519
Download: ML20214Q100 (5)

Text

.

l

,4 f** .,( UNITED STATES

\

(

1

) p, NUCLEAR REGULATORY COMMISSION r,.

WASHINGTON, D. C. 20555

%.w....]j Eccket hos.: 50-424 and 50-425 APPLICANT: Georgia Power Company FACILITY: V0GTLE, Units 1 and 2

SUMMARY

OF MEETING TO DISCUSS V0GTLE THERMAL LAG ANALYSIS On November 25, 1986, the staff met with the applicant and its representatives to discuss the thermal lag analysis used to qualify four types of equipment to the containment worst-case temperature profile (352 F). Participants are listed in the enclosure.

The applicant stated that the four types of equipment (aporoximately 50 pieces) for which the thennal lag analysis was used (because they are not qualified by test to 352*F) are (1) Limitorque valve operators (2) NAMC0 limit switches, (3)

J3 cable, and (4) fan cooler motors. The applicant described its analysis which considered corroonent surface temperature. The applicant did not consider con-densing heat transfer and therefore assumed that the component temperature was 253*F at the onset of the transient rather that 120"F. The staff indicated that it believed this was a conservative assumption. The applicant then considered convection heat transfer to detenaine component surface temperatures. The applicant's analysis was done for four riain steamline cases (numbers 3, 6, 9, and 12) as specified in FSAR Table 6.2.1-65.

The worst case results of the thennal lag analysis are tabulated below for the four types of equipment as discussed at the meeting.

Maximum Qualification temperature of temperature Margin transient ( F) by test (*F) (*F)

Limitorque valve 282 300 18 operators NAMCO limit switches 300.1 340 39.9 J3 cable 328 339 12 Fan cooler motors 305 337.5 32.5 The only type of equipment which does not have at least a 15 F margin is the cable. The staff indicated that this appeared acceptable based on the conser-vatisms in the applicant's analysis. The applicant agreed to provide a submittal discussing its calculations, conservatisms, and results by December 5.

The applicant will a!so revise the SCEW sheets for components inside contain-ment to reflect the use of the 352 F profile as well as indicate on the SCEW sheets the use of the thennal lag analysis. These SCEW sheet revisions will also be provided by December 5. The applicant also stated that it would revise FSAR Figure 3.11.B.1-1, Sheet 9 of 12, by anendment by December 5,1986.

8612040519 861201 PDR A

ADOCK 05000424 PDR

1 DEC 1986  :

The staff clarified for the applicant questions contained in the Novenber 18, 1986 request for additional infonuation. The applicant stated that it wculd respond to this staff letter by December.1,1986.

The staff and applicant also briefly discussed the Vogtle mechanical equipment qualification program. The staff questioned the exclusion of snubbers frcn the '

program. The applicant responded that is has no safety-related srubbers con-taining soft parts; the Vogtle snubbers 'are geared or springed. The staff indicated that it would provide the applicant with three pieces of eaufpment for which the staff requires subnittal of more detailed qualification infor-mation by fievember 26, 1986.

The staff and applicant also scheduled a meeting on December 5 for the staff to review the applicant's cable qualification documentation to ensure that Vogtle cables does not contain chlorinated polyethylene (CPE) sheathing related to contention 10.3.

fielanie A. Miller, Project Manager PWR Project Directorate #4 Divic. ion of PWR Licensing-A

Enclosure:

As stated cc: See rext page IV jl #

Idh@ ,

PM % QVkR-A PWR14fDP -A f/M1 ifth'/ rad BJY0up'gb ocd 11/ E6 11/IVE6

MEETING SUFFARY DISTRIBUTION

' Docket File NRC Participants NRC PDR l'. 14 iller L PDR F. Rosa NSIC H. Walker PRC System G. Hubbard PWR#4 Reading File M. Duncan 0GC J. Partlow E. Jordan B. Grimes ACRS (10) ,

OTHERS bcc: Licensee &. Service List

+

Mr. R. E. Conway

• Georgia Power Company Vogtle Electric Generatiro Plant cc:

Mr. L. T. Gucwa Resident Inspector Chief Nuclear Engineer Nuclear Pr.gulatory Commission Georgia Power Company P. O. Box 572 P.O. Box 4545 Waynesboro, Georgia 30830 Atlanta, Georgia 30302 Mr. Ruble A. Thomas Deppish Kirkland, III, Counsel Vice President - Licensing Office of the Consumers' btility Vogtle Project Council Georgia Power Cor.pany/ Suite 225 Southern Corr.pany Services, Inc. 32 Peachtree Street, N.P.

P.O. Cox 2625 Atlanta, Georgia 30303 Birmingham, Alabama 35202 Jaros E. Joiner Mr. Donald 0. Foster Troutman, Sanders, Lockerman, Vice President & Project General Manager & Ashmore Georgia Power Ccmpany Cardler Building Post Office Box 299A, Route 2 127 Peachtree Street, N.E.

Waynesboro, Georgia 30830 Atlanta, Georgia 30303 Danny Feig Mr. J. A. Bailey 1130 Alta Avenue Project Licensing Manager Atlanta, Georgia 30307 Southern Company Services, loc. .

P.O. Box 2625 Carol Stangler Birmingham, Alabama 35202 Georgians Against Nuclear Energy 425 Euclid Terrace Ernest L. Blake, Jr. Atlanta, Georgia 30?07 Bruce W. Churchill, Esq.

Shaw, Pittman, Potts and Trowbridge 2300 h Street, N.W.

Washington, D. C. 20037 Mr. G. Bockhold, Jr.

Vogtle Plant lianager Georgia Power Company Route 2, Box 290-A Waynesboro, Georgia 30830 Regierel Adninistrator, Region !!

U.S. Nuclear Regulatory Commission 101 Parietta Street, N.W., Suite 29C0 Atlanta, Georgia 30323 i

i

, ' ~-

, Enclosure i

PARTICIPANTS ,

NRC BECHTEL PC Miller J. Purucker F. Rosa P. Barbour H. Walker J. Railey G. Hubbard S. Freid A. Vieira.

GEORGIA POWER COMPANY SOUTHERN COMPANY SERVICES T. Fenland J. Bailey J. Wheless 9

O i

t

,