ML19256D669

Summary of 780224 Meeting W/Met Ed Re Proposed Extension of Cycle 3.Attendee List & Request for Addl Info Encl

ML19256D669
Person / Time
Site:	Crane
Issue date:	03/06/1978
From:	Zwetzig G Office of Nuclear Reactor Regulation
To:	Office of Nuclear Reactor Regulation
References
NUDOCS 7910220583
Download: ML19256D669 (6)

Text

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q MEETING

SUMMARY

DISTRIBUTION ORB #4 Metropolitan Edison Company ATTN:

Mr. J. G. Herbein Vice President P. O. Box 542 Reading, Pennsylvania 19603 L. Shao Docket Fil R. Baer NRC PDR W. Butler L PDR B. Grimes ORB #4 Reading Project Manager NRR Reading Attorney, OELD E. G. Gase 01&E (3)

V. Stello R. Ingram K. R. Goller R. Fraley, ACRS (16)

T. Carter T. B. Abernathy D. Eisenhut J. R. Buchanan A. Schwencer Meeting Sumary File D. K. Davis NRC Participant (s)

G. Lear

- WBrooks R. Reid HRichings MDunenfeld RLandry 1453 003

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Docket No.: 50-289

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LICENSEE: METROPOLITAN EDISON, COPRANY......~...

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SUMMARY

OF MEETING HELD ON FEBRU4RL24 1978..TO. DISCUSS PROPOSED '.

7" EXTENSION OF '.'YCLE 3-

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Bylettedda'tedFebruary7;l@78,.Mropo11tanEdison.(Meted)had requested mvision of the TMI-1. Technical Specifications to permit.

..... t extension of the current operstfog. cycle.(Qycle.3)...The purpose.,

of this meeting was to obtain.further information concerning the. _. ;.

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.Mueans-t(which the extension-of-.opention,would.be achieved,and. J.'k.e.c,r. - _.

'~..wjHconcerning the acceptability.cf operationjdunng.the extension.of_.;<.

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W,1 the cycle. Questifons sent. to,the licensee.by. facsimile,transm.ission..,.

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fHghlights of the, discussion were,.as.follows Lil'.c..,a.i.1 4:4,..,..t.. '4

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le Met Ed stated the reactivjtyfneeded,for exteosion.of the. cycle.f f,

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wili be~obtained by a stepwise reduction.in, power,,thus obtaining 2,x..

T An. *reactivtty from'the negat.1ve power. coefficient.and. reduced equilib -

tiin-xeram. Power Wi11.he. reduced.in, steps.to.ma.intain..the. _

c regulatJng bank within a.gontml. band.near the fully withdrawn

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position. The requested. extension,isafmm 280.EFPD to 315 EFPD...

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. At 315 EFPD,f Het Ed estinstes tm. reactor. power,will. be.about 55%..

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12. Met Ed stated the proposed.new. limits.on, axial. power, shaping md.,..

porftion and axial imbalance'are.provided..to_smintain peaking.

. f L factors during the cycle extension,within,the values.previously,_. s considered.

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Het Ed provided data indicating that fuel. mechanical. design and.

- DNBR limits would not be. exceeded,by, extending.the. cycle...

4' Het Ed stated that extensica.of. Cycle.3 would.cause.a.redi.rtion in the moderator tecperature coefficient.of. reactivity from.

. about -2.54 X 10-4 to about -2.6_X 10-9.ak/k/*F.

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severe consequences at the.end_of. cycle. bad been. analyzed with i.

an asstaned moderator coefficient of.-3.0 X.10-4. Ak/k/?F.

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fore, they concluded that.the consequences of. postulated events _

occurring during the cycle. extension,were. bounded.by.the FSAR.

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5., Met Ed supplied additional. information.on.the effect of_the cycle.

4 extension on various quantities. including shutdown margin.. ejected rod worth..etc.

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- 6. " Met Ed cosmitted to provide written. documentation of_the,information

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G. B.~. Zwetzig, Project Manager,

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Attachments: ' '

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List of Attendees

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List of Questions Sent ',,,,,....;,,_...

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e ATTACHMENT 1 c

LIST OF ATTENDEES E TING WITH MET ED FEBRUARY 28, 1978 NRC G. Zwetzig W. Brooks H. Richings M. Dunenfeld R. Landry MET ED D. Curry J. Hilbish W. Potts GPU G. Bond J. Luoma 1453 006 B&W J. Howard J. Lojek

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RECUEST FOR ADDITIONAL INFORMATION TMI-l CYCLE 3 EXTENSION 1.

Why is it necessary to change the APSR position limits curve f r coast down operation?

Is this change safety related or is it primarily for Cycle 4 burnup consideraticos?

2.

What is the mest reactive position for the APSR's?

Is there a reactivity gain in moving them further out?

3.

We would like a more thorough explanation of what is being done and why.

4.

What will be the effect on the accidents and transients as a result of repositioning the APSR's?

Few will the peaking factors be changed?

5.

In the Sabcock & Wilcox reload report for Cycle 3 (EAW-1142),

the statement is made on page 4-2 that the maximum expected three-cycle local pellet burnup is less than 55,C00 mwd /mtU.

Whr.t will the value be for an extensien of Cycle 3?

How will this affect the ability to meet the design criterion on cladding strain of 1%?

6.

How does extension of Cycle 3 affect the ability to provide the required shutdcwn margin as shcwn in Table 5-2 of 3AW-1112?

1453 007

r ttachment 2 (cont'd) 7.

How will extension of Cycle 3 affect the minimum DNBR?

8.

What is the effect of the Cycle 3 extension on the accidents considered in Sections 7.4, 7.6, 7.8, and 7.14 of BAW-1442?

1453 008