AECM-90-0158, Forwards Quarterly Status Rept for Reg Guide 1.97 Re Neutron Monitoring Sys for Period Ending 900630.Rept Includes Major Actions Completed to Date for Unit ex-core Sys.Estimated Milestone Schedule for Activities Also Encl

Forwards Quarterly Status Rept for Reg Guide 1.97 Re Neutron Monitoring Sys for Period Ending 900630.Rept Includes Major Actions Completed to Date for Unit ex-core Sys.Estimated Milestone Schedule for Activities Also Encl

ML20059J010
Person / Time
Site:	Grand Gulf
Issue date:	09/08/1990
From:	Cottle W ENTERGY OPERATIONS, INC.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
RTR-REGGD-01.097, RTR-REGGD-1.097 AECM-90-0158, AECM-90-158, NUDOCS 9009190131
Download: ML20059J010 (5)

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U.S. Nuclear Regulatory Commission 1 Mail Station P1-137 Washington, D.C. 20555 i Attention: Document Control Desk Gentlemen:

SUBJECT:

Grand Gulf Nuclear Station i Unit 1  ;

Docket No. 50-416  ;

License No. NPf-29 1 Quarterly Status Report for RG I.97 )

Neutron Monitoring System for the Period Ending June 30, 1990 AECM-90/0158 >

As discussed in AECM-89/0013 dated February 6, 1989, Entergy Operations  !

l requested a change in commitment related to Regulatory Guide (R ) 1.97 for the <

l implementation of an excore Neutron Monitoring System in lieu o an incore ,

type system. TheNRCapprovedtheEntergyOperationsrequestasdiscugsedin a letter dated July 21,1989(MAEC-89/0228), and requested Entergy Operations ,

to continue submitting quarterly status reports for NRC review. '

In response to this request, Attachment 1 provides'the RG 1.97 Keutron l- Monitoring System Quarterly Status Report for:the period ending June ~ 30,'1990. .

This report includes major actions completed to date for the GGNS excore system and those major actions necessary to complate implementation of the system. . Attachment 2-provides an estimated mi,1estoi;e schedule.of.these activities.

In accordance with Operating License Condition 2.C (36), Entergy Operations.is continuing to pursue implemention of an excore Neutron Monitoring System for. -

RG 1.97 as discussed in the Attachments. -Please; advise if you require any l additional information on this matter.

Yours truly, i

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I WTC:ams Attachments- ,

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AECM-90/0158 Page 2 cc:

Mr.T.D.

Mr. H. C. Hintz(w(w/a)

Cloninger /a)

Mr. R. B. McGehee (w/a)

Mr. N. S. Reynolds (w/a) i Mr.H.H.

Mr. O. L. Thomas-(w/o)(w/a)

Christensen j

Mr. Stewart D. Ebneter (w/a) l Regional Administrator l U.S. Nuclear Regulatory Commission ,

Region 11 101 Marietta St., N.W., Suite 2900 Atlanta, Georgia 30323 .

1 Mr. L. L. Kintner, Project Manager (w/a) ]

Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Mail Stop 11D21 a l

Washington, D.C. 20555 i

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..- .-* Attachment 1 to AECM-90/0158' RG 1.97 NEUTRON HONITORING SYST5N QUARTERLY STATUS REPORT (PERIODElWINGJUNE 30,1990)

1. GENERAL IMPLEMENTATIOW SCHEDULE STATUS Entergy Operations is. currently progressing on schedule for the -;_

implementation of an excore Neutron Monitoring System for Regulatory' -

Guide (RG) 1.97. The current GGNS design approach involves the :r instu11ation of two instrument channels with one detector:for each !j channel. The detectors willibe' located within holes bored in the shield-wall to. provide the greatest: sensitivity for neutron detection.- Under-full power or hot operating conditions upon shutdown :Entergy-Operations-'

anticipates .a sensitivity of up to 1 E-6% power.

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11. MAJOR ACTIVITY STATUS  !

The following provides a discussion of the status for the major' activities necessary to complete: implementation of the system:. j 1.- Perfom detailed engineeringiand design for. the' excore system.

o In progress. Some specific actions for this majorJactivity-are:

- The Excore Neutron Monitoring' System Design Criteria has been  ;

completed and is currently. undergoing' final project review.- q

--The Excore Sc tem'PurchaseLSpecification:has been: completed 4 and is curren.n scdergoing final project review.

1

- Entergy. Operations is evaluating' Gamma Metrics environmental qualification design criteria and test reports for-

. applicability to GGNS.

- The GGNS Containment' Penetration Design Specifications;for:

the Neutron Monitoring System, necessary.for establishing the-penetration purchase specification, will be completed.

- Detailed determination and evaluation.of available sensor locations will be made from information obtained by walkdowns during RF04. ,

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2. Perform an evaluation of GGNS specific excore Neutron Monitoring

' System range compliance.

' Complete, as summarized below:

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- Entergy Operations has reviewed th'e locational censiderations for installing the GGNS excore Neutron' Monitoring System'to attempt ~to meet the ange of 1 E-6% to=100% power given'in RG 1.97.

- In order to attempt to meet a range of 1 E-6% to 100%. power, Entergy Opera &. ions has detemined that holes must'be. bored in the shield 4 1 and-the detectors mounted within these holes..

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Attachment:

Il to A' ECM-90/0158

3. Obtain NRC review of the BWROG alternate neutron monitoring position report-(NEDO31558),

o Complete; af ter review; the NRC. staff rejected the positions .in-report NED0 31558. *

4. Following. item 3 above, Entergy Operations submitted PCOL-90/01' -

(Revision 2 transmitted via'AECM-90/0118 dated ~ June 22. 1990) to' change.the commitment-for installation of the RG:1.97 Neutron

. Monitoring System to the end of_RF05.-

4 o -Complete.

5.- Obtain NRC= review and approval o'f_PCOL-90/01.

o In progress,4cheduled to'be completed by November 15,,1990.. j

6. Develop and issue purchase specifications:for the excore system: -l hardware, j o' In_ progress-(see.. item 1 above).

7. Develop and-issue a design change package for GGNS installation of the excore. system.

o -In progress'(see items 11 and'2 above)..- Ll 8.- Receive excore sy. stem hardware onsite for installation, j p

Future action.

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9. Install:the:excore system.

o Future action. q j

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• The BWROG has appealed:the Staff's position.' The NRC review of this' appeal l is now in progress.

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- Attachment 2 to AECM-90/0158 ESTIMATED MILESTONE SCHEDULE FOR INSTALLATION OF EXCORE NEUTRON MONITORING SYSTEM FOR RG 1.97 L:

1990 l 1391 l .

1992' A -5 0 N D J F M 6 M- J J A S O ~N D- J F M A M.

1 -~ l I l l l l I I I~ l I l l 1 I I I I 'I l -'

1. Perform detailed engineering and design for excore system l~

2. Perform evaluatior of excore system (complete) ange compliance FF05 5

3. Obtain NRC review of b 40G alternate (complete)

NMS position report (NEN 31558).

4 Submit PCOL to change comm ittment (complete)

5. Obtein NRC revie# approval ef PCOL-90/01 -l

6. Develop and issue purchase-

. specification for excore hardrare

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7. Develop and issue design cha'ge package for GGNS installatic 1 of l_

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excore system

8. . Rec =*we excore hartfware onsite for ~

system i 3ta11ation -l

9. Install encore system at the 'ifth refueling outage:- "'

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