ML19319A689

Forwards Request for Addl Info Re Reactor Vessel Surveillance Program.Info Required within 45 Days

ML19319A689
Person / Time
Site:	Oconee
Issue date:	11/16/1976
From:	Schwencer A Office of Nuclear Reactor Regulation
To:	Parker W DUKE POWER CO.
References
NUDOCS 7911210648
Download: ML19319A689 (5)

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Duke Power Caucany f' y -

ATTN: Mr. Willian 0. Parker, Jrn,c j

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Gentlemen:.

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On itarch 26, June 25 and April 16,,1976, the Commission issued exemptions' from the provisions of 10 CFR Part 50 Appendix Hiwhich authorized opera-t 6

tion of Occme Units Nos.1, 2 'and 3, respectively for up to one operating. Q cycle. These exemptions permitted operation with reactor vessel surveil-lance specimens removed from their reactor vessels.

In addition, on October 23, 1976, the Commission issued another exemption for Oconee.

Unit No. 3 which authorized operation for one additional cycle with the.

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. reactor fvessel surveillance specimens removed from the Oconee Unit No. 3

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v y-As you are awatre, since granting' these exemptions, the NRC staff has met several times with the MSSS vendor, Babcock & Wilcox, (B&W) concerning a proposed " integrated surveillance program." Within such an' integrated.

program, vessel' surveillance specimens from one reactor would be irradiated.,;

at otherr.similar.B&W-designed reactors. Appitcations discussing such a

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program have' been received from~three licensees. This. program would be inn lieu of reinsta11ation of redesigned specimen surveillance holder tubes (SSHT)' -

in vesself from which the original design _SSHTs were removed. We have not, at th?s time, however,' made a detensination as to-the. acceptability of. such' '.a

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.Stace most of the exemptions ~noted.above w1.,11 expire within the next few ' f months and since: the selection'of r course of action other than ~ rein G; M..

stallation of specimens' in the ve'sseY,t' rom whi.ch they were removed mat,2 <

T require an extended period of time for staff review, please-inform us of'

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~,your course of action to res'olve'this issuc ind provide'a detailed action plan for 0conee Units Nos.il.12 ind '3 'withiii 20 days of receipt of this.:,m

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i letteri If your plans involve installation'of the specimens in other than L

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their original vessels, we request the info'rmation-listed in Enclosurejl 4

to thi.s.' letter. be: submitted:within 45 daiys of the. receipt of_th_is.let.terh-M jhl

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toughness of the Oconee Units Mosel,'2"and 3 vesselmaterialCyou4.m ed'67;J3 should also submit withinL45 days of. receipt of' this letter, a: descriptionT9'.O*

1 of any additional program you_ plan, to implement to' satisfy the fracture'

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toughness requirements.of Appendix:G to.10 CFR Part 50:(specifically 1

ParagraphV.C). Since such a program may requira data from the-surveillance :

q'4 programs at several reactors, you should_also address-the appropriate.

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-questions.in Enclosure 1 as they relate,to.:your planned program in this.

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Paragraph V.C). Since uch a program m require data fror: the surveillance programs -at several rea rs ' you sho d also address the appropriate.

.' questions-inEnclosure11 they re te to your planned prograr. in this area. 'It:is our understandi,

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Duke P.twer Company November 16,'1976 cc: Mr. William L. Porter Duke Power Company P. 0. - Box 2178 422 South Church Street Charlotte, North Carolina 28242 Mr. Troy B. Conner Conner & Knotts 1747 Pennsylvania Avenue, N. W.

Washington, D. C.

20006 Oconee Public Library 201 South Spring Street Walhalla, South Carolina 29691 Honorable James M. Phinney County Supervisor of Oconee County Walhalla, South Carolina 29621 Office of Intergovernmental Relations 116 West Jones Street Raleigh, North Carolina 27603 D

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REACTOR YESSEL SURVEILLANCE PROGRAM

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REQUEST FOR ADDITIONAL INFORMATION 1.

Provide your contingency plans for' assuring that your surveillance program will not be jeopardized by an extended outage of any other reactor (s) from which you expect to receive data.

What time limits will you place on the host

• reactor (s) for given outage and justify these limits.

2.

Provide you program and schedule for installing the redesigned surveillance capsule holders in your reactor in the event this action becomes necessary.

What is the schedule for withdrawal of your capsules from tile host reactor (s)? Relate the schedule to predicted trends in adjusted reference temperature and Charpy upper shelf energy. What arrangements have been made with the owners of the host reactor (s) to assure that this withdrawal schedule will be met?

3.

Specify the minimum and maximum radiation lead times for: (a) surveillance specimens relative to the vessel beltline inner surface, and (b) surveillance specimens relative to the 1/4T position in the vessel wall, which you will require for guest specimens exposed in the host reactor (s).

Justify the values specified.

4.

Indicate the corrective action to be undertaken at the guest reactor if the limits specified in response to Question 3, above, cannot be met.

If the corrective action does not involve reactor shutdown, justify the proposed alternative.

5.

Describe how the operating staff of the guest reactor will keep informed of the exposure status of the guest specimens at the host reactor (s) relative to the limits specified in response to Question 3, above.

6.

Submit amended proposed Technical Specifications that reflect the appropriate portions of your responses to Questiv.s 2, 3, 4 and 5 above.

• The " host reactor has the redesigned surveillance specimen capsule holders for irradiation of both the " host capsules" which contain material representative of the host reactor beltline, and " guest capsules" which represent (for want of a better word) " guest reactors".

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