ML20125B407

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Summary of 720911 ACRS Meeting W/Licensees in Washington DC, to Review Full Term Operating License.Agenda Encl
ML20125B407
Person / Time
Site: Monticello Xcel Energy icon.png
Issue date: 09/27/1972
From: James Shea
US ATOMIC ENERGY COMMISSION (AEC)
To:
US ATOMIC ENERGY COMMISSION (AEC)
References
NUDOCS 9212090345
Download: ML20125B407 (7)


Text

{{#Wiki_filter:. . . g)  %, umToo suTos ATOMIC ENERGY COMMISSION k q , , us,u ~m e,~ o c ems m W - } #g SEP 2 7 mz Files (Docket No. 50-263) THRU: I L .3 Z mann, Chief, ORB #2, L ax MONTICELLO - AC

                                          'UBCOMMITTEE REVIEW FOR FULL-TEPJ! OPERATING LICENSE llembers of the t!onticello ACRS Subcommittee, H. Etherington and H. S. Isbin, met in Washington D. C. , on September 11, 1972, with Nortnern States Power Company (NSP) and AEC Directorate of Regulation (DR) representatives to review the NSP application for a full-term operating license (FIDL) dated June 15, 1972, and the AEC Directorate of Licensing (DL) Saf ety Evaluation dated August 25, 1972. DL was questioned about General Electric report NEDO 10299 (January 1971),

Flow Distribution Measurements in Monticello Core, specifically whether or not we had considered this report in the Monticello Safety Evaluation for a FTOL. We responded that the repor t had nut been evaluated as part of the DL Safety Evaluation. Mr. E. C. (A1) Ward was the spokesman for the NSP representatives when they joined the meeting and began their formal presentation. -An agenda for the meeting and a list of NSP attendees was distributed while Mr. Etaerington, Chairman of the Subcommittee, made his opening remarks which included plans f or a second Subcoamittce meeting prior to the full ACRS meeting which, at the conclusion of the meeting, was tentatively scheduled for October 5 or 5, 1972. NSP f ollowed the attached agenda with f requent references to their FTOL application. Dana Ditmore of General Electric (GE) presented - the f ollowing comparative fuel information (not previously presented) as a oasis f or the conclusion that GE fuel clad creepdown is negligible and that, in accordance with GE NEDO 1050, " Fuel Irradiation Experience", supported by extensive visual, neutronic and gacma graph examination of GE irradiated fuel, there is no evidence of fuel clad collapse and none is expected. Clad creepdown is an important clad collapse consideration, as GE sees it, based on the limited nonproprietary information on Ginna fuel clad collapse made available to them by the AEC. 1 9212090345 720927 PDR ADOCK 05000263 O PDR

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Files SEP 2 71972 COMPARISON O_F GE AND_WESTINGH0_USE FUEL Fbnticello - Ginna Fuel- UO 2 UO 2 Density (percent of theoretical) 95 90-92 & 94 Fuel diameter - inches 0.487 0.367 Gap - inches 0.012 0.0065 Clad Zircaloy Zircaloy Clad diameter - inches 0.531 0.396 Clad thickness 0.032 0.024 Coolant pressure - psig 1015 2250 Mean clad temperatu+ e *F for top 1/3 core 585 660 Clad primary membrane stress psi 8600 18,500 GE representatives reported that 280 TIP scans wera part of more than 7500 TIP scans reviewed by GE f or evidence of nuclear signal perturbation that might be indicative of enlarged f uel pellet spacing gap or clad collapse. No such indications were expected or discovered. He also noted that total length of fuel columns had not changed by more than 0.5% and that this value may be lower because good preirradiation ref erence measurements were not made. The Subcommittee requested:

1. NSP to furnish copies of all agreements with the State of Minnesota or other state agencies.
2. NSP to provide isotope release limits permitted by the State compared with proposed Appendix I to 10 CFR Part 50.
3. A point by point review of the P. A. Morris October 1971 letter to USP.

4 e Files - 3-  ; r r

4. Reconsideration of the significance of the grinder caused ,

torus damage. ~

5. Reevalnation of the effect on fuel life of transients such as pribary u stem / blawdowns. [CE had indicated that fuel rous with hydride blisters could pop earlier but that net (end of core life) fuci rod douage would not be increased by such blowdown incidents.)
6. A reanalysis by General-Electric of the consequences of '

I uccond, or the f astest possible, isolation valve closure instead of the minimum c) sure time of 3 seconds as currently required by the Technical Specifications.

7. An evaluation by DR of comparative isolation valve closure and Icak rateo for operating BWRs.
8. An evaluation by DR of of f-gas release experience as f uel depletes at other BWRs, and modifications that have been made at other operating LWRs.
9. An analysis of the effects of transient iodine releases during power level changes or blowdowns.

At the conclusion of the meeting, the Chairman- confirmed the necessity , for another Subcommittee meeting prior to the full ACRS meeting early in October to review in detail (2-3 hours) with the DL staf f the DL Safety Evaluation for Monticello', to consider NSp evaluation of a number of significant abnormalities such as those revealed by NSP in Attachment 7, and other generic items to be identified by Dr.1sbin and made available to NSP through the DL staff. Dr. Isbin was to 4 consult with tne full ACRS committee with regard to desirability for the - DL staf f or the ACRS to meet with state officials to review arrange-ments aud agreements between NSP and State of Minnesota agencies as related to accidents at Monticello that could affect the health and - safety of the public, and advise us of the outcome.

                                                                               ~
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                                                                             .      -             ~

ames J hea

                                                                                 .bperating Reactors Branch #2 Directorate of Licensing

Enclosures:

1. Agenda
2. List of significant abnormalities cc: See attached list
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{ MON"'ICELI4 ACRS SUBCOMMITTEE IG:ETING. September 11, 1972 Ar,ENDA 1 IntYoductiOD ............................................... Al Vard i 2 Statue of Stato Agencies ................................... Al Ward 3 Statun of Intervenors ...................................... Gerald Charnoff- l 4: General Office Management and Plant Organizatic ........... Ice Mayor ti 5 ?hysical Changea to th+ Plant .............................. Marc Voth j 6 significant Operating Abnormalities or Deficiencies ........ Morgan Clarity 7 Other Plant Incidente Related to Montice.llo ................ Morgan Clarity i 8 helear Fuel - Generic Status .............................. Dana Ditmore 9 holonr Fuel - Monticellok................................... Maro Voth  ; 10 Post-Accident-l!ydrogen Control ............................... Duano Fitzgere AP 11 January 10, 1970 ACRS Letter Iter.o - S tatus Report . . . . . . . . . . . Duano Fitzgerald. Discussion Items h r e, _ I b 5

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I MONTICELIO ACRS SUBCOMMITTEE MEETING September 11, 1972- l Appliennt Attendees { NSP -- E O (A1) Ward, Director, Engineering Vice Presidential Start- i Lee Mayer, Director - Nuclear Support Services , -; 4 i Gorry Neils, conorni Superintendent - Nuclear Power Plant Operation , Chuck Laroon, Monticollo Plant Manager l Morgan Clarity, Superintendent Monticello Plant Engineering & Radiation Protectiot  : Leon Eliacon, Monticello Radiation Protection Engineer  ! a Marty Dinville, Monticello Plant Engineer - Operations

                                                                                                                                                                                                                                 =i Marc Vgth, Administrator - Nuclear Support Services                                                                                                                                                           :

Don Bohn, Supervising Environmental Engineer. , LEGAL COUNSEL Gerald Charnoff, Shaw, Pittman, Potto,. Trowbridge & Madden GENERAL ELECTRIC Jack Benson, Manager of Safety and Licensing Operrator 1 Plstnts Fritz Frauenholm, Specialist - Safety and Licensing Dana Ditmoro, Manager of NPD Fuel Applications 00MSULTANTS Dr Duane Fitzgerald, ~ Senior Staff Consultant - NUS Corporation

                     'Dr John Robinson Nuclear' Engineering - Black & Ventch
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1. TW fiystren and pianp prtibinne. I i

P. lA> i n t ur e r. p. ira t or lovel probimer.. i

3. HPCI cyntun, including oP, problonn.

3 4 Recire ptrnp and pterp teal probluns.  ! v

5. Rolinf and safety valve problunn.g
6. Air ejector water loop seal problems. , -f 4
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7. RHR eervice water cycten problens.
8. Core reactivity problen.
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9. MS flow restrictor problems. i
10. MSIV probluns. ,

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