ML20134B406

Summary of 740117 Meeting W/Applicant in Chevy Chase,Md Re Remaining Areas of Concern on Mechanical Design of Facilities

ML20134B406
Person / Time
Site:	Vogtle, 05000426, 05000000, 05000427
Issue date:	01/29/1974
From:	Crocker L US ATOMIC ENERGY COMMISSION (AEC)
To:	US ATOMIC ENERGY COMMISSION (AEC)
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References
FOIA-84-293 NUDOCS 8508150611
Download: ML20134B406 (5)

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• UNITED STATES

- 1 ATOMIC ENERGY COMMISSION

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• WASHINGTON D.C. 20548

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January 29, 1974 Docket Nos. 50-424 50-425 50-426 50-427 Applicant: Georgia Power Company Facility: Alvin W. Vogtle Nuclear Plant

SUMMARY

OF MEETING TO DISCUSS REMAINING AREAS OF STAFF CONCERN REGARDING MECHANICAL DESIGN A meeting was held with the applicant in Chevy Chase on January 17, 1974, to discuss remaining areas of concern regarding the mechanical design of the Vogtle plant. Attendees at the meeting are listed in the enclosure. A summary of the points covered the meeting is presented below.

Seismic Qualification of Equipment Request for information 3.44 had forwarded to the applicant the staff position regarding the seismic qualification of equipment. The response from the applicant was considered not a definitive commitment. During the meeting, the applicant stated that it would commit to IEEE 344, 1971, with attention paid to cross coupling. Depending upon the wording of the actual commitment, this is considered acceptable to satisfy the previously stated staff position.

Pipe Whip Restraint Design Criteria The applicant stated that WCAP 8082 will be used for the design analysis of primary coolant system and that BN-TOP-2 " Design for Pipe Breaks Effect" will be used for branch lines from the primary loop and for all balance-of-plant piping. The design will consider the affacts of pipe whip, blowdown jet, and reactive forces. The_ applicant stated _that,.the d3=j_en2411

_ orovide rest.r=4aP=_at_a_ minimum m o @ . a e w -loca-ti,ogs on_each hfwh-eneyev ninine n= regardless of calculated.sCIPss

._.y The applicant questioned the staff position recently taken on Arkansas 1 l (Docket 50-313) regarding augmented inservice inspection of high energy lines in compartments and areas not otherwise calculated to contain high stressed piping. Briefly, the staff position expands the criteria stated in the December 15, 1972, letter to incorporate an augmented inservice inspection of the piping, regardless of stress level, in J

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O 'D those plant areas where the consequences of a break would be unaccep-table. For example, if a high energy line runs near the centrol room and if a break could result in knocking down the control room wall, prudence dictates that the piping be inspected periodically even though calculations indicate that the stress levels in the pipe at this point do not warrant special restraints $' shields.

The LPM will prepare a letter to the applicant documenting this staff position and incorporating it as a requirement for the Vogtle plant.

Vibration Test Program The applicant stated that Indian Point 2 (Docket No. 50-247) has been selected as the prototype plant for Vogtle to determine the vibrational characteristics of the reactor intervals. The Trojan plant (Docket No.

50-344) will be instrumented to confirm the vibrational characteristics of the changes to the neutron shielding pads and the 17 X 17 fuel assembly in lieu of the previously tested thermal shield and 15 X 15 fuel assembly. The confirmatory test program for Vogtle will satisfy Regulatory Guide 1.20.

Allowable Primary Stresses 9

Request for information 5.1 and 5.13 asked for a designation of specific procedures to be applied for design analysis of the primary system under faulted conditions. The response to date is condidered inadequate. At the meeting, the applicant stated that the specific response to 5.13 would be a reference to RESAR. However, R. Bosnak pointed out that RESAR Tables 5.2-8 and 3A-2 have not as yet been approved. These identical tables present allowable primary stresses for the faulted plant condition.

Some discussion ensued regarding the acceptability of this table, but without resolution. The applicant will be required to provide acceptable stress limits as a part of the Vogtle docket. He was told that if he designed to Appendix F of Section III of the ASME Code for these stress limits and methods of evaluation, they would be accepted.

Experimental Stress Analysis Requests for Information 5.2 and 5.14 asked for an identification of

, components whose design is based on experimental stress analysis. The response to date was considered inadequate. During the meeting, the applicant provided a draf t revision to page 5.2-3 of the PSAR which should take care of our concerns. R. Bosnak is evaluating and we will inform the applicant as to the acceptability of the draf t response for do cke ting.

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o a Mechanical Systems and Components There was considerable discussion at the meeting regarding stress limits and loading combination fer the various ASME classes of vessels, piping, .

, pumps and valves as furnished by Westinghouse and Bechtel. The appli-cent indicated that Section 3.9 of the PSAR, which addresses these matters for Class 2 and 3 components, was in the process of revision and would be submitted in the next amendment on January 28, 1974. There would also be changes to Section 5.2. The oral responses from the applicant and draf t tables presented by the applicant during the meeting appear to be acceptable with the exception of the faulted stress limits for Class 1 components as previously discussed.

. P. Cr er, Project Manager Light Water Reactors Branch 2-2 Directorate of Licensing

Enclosure:

As Stated i

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ENCLOSURE 1

V00TLE MEETING l JANUARY 17, 1974 4

AEC Larry Crocker R. J. Bosnak Southern Services Incorporated Mike Crisler O. Batum R. A. Thomas W. T. Caskell R. F. Miller J. C. Vance Weeeinthouse

, J. L. Vota Will Gangloff H. G. Corer Al Geisler S. A. Image

, A. B. Higginbotham T. C. Esselman Bechtel Power Company C. S. Welty Don Coudriet Paul L. Goodman R. B. Linderman D. Bojic S. Schiffer John Gascoyne Byron Leonard Larry E. Shipley I

O

.... DISTRIBUTION:

o o" Docket File EP Project Manager

. AEC PDR Project Manager Local PDR OGC L. Reading R0 (3)

RF Reading M. Service R. R. Maccary AEC Participants V. Stallo R. Fraley (16)

1. L. Tedesco H. R. Denton J. P. Enight S. S. Paulicki L. C. Shao T. M. Novak D. F. Ross R. W. Houston T. A. Ippolito C. Long G. fainam <

V. Benaroya i R. H. Vollmer

, B. R. Grimes j W. P. Gammill J. Kastner M. Spangler

.! R. L. Ballard I S. Varga

, D. Risenhut I J. Hendrie V. A. Moors

} R. C. DeYoung l D. J. Skovholt D. R. Muller W. R. Butler J. F. Stolz R. A. Clark R. E. Ireland D. B. Vassallo K. Kniel R. R. Go11er

! A. Schwencer R. J. Schemel D. L. Zieman

, P. L. Collins G. W. Knighton G. Dicker

B. J. Youngblood ,

W. H. Regan, Jr.

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