ML20236N059

Application for Amend to License DPR-65,adding New Surveillance Requirement Re Control Room Habitability.Fee Paid

ML20236N059
Person / Time
Site:	Millstone
Issue date:	08/03/1987
From:	Mroczka E NORTHEAST NUCLEAR ENERGY CO., NORTHEAST UTILITIES
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
Shared Package
ML20236N063	List: B12630, Proposed Tech Specs,Adding New Surveillance Requirement Re Control Room Habitability ML20236N059
References
TASK-2.K.3.03, TASK-TM B12630, TAC-45357, TAC-65886, NUDOCS 8708110357
Download: ML20236N059 (3)

Text

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i NORTHEAST UTILITIES cenerei Orrices. seiden street, Beriin. connecticut 9

Ev EEsY [c5 I I P.O. BOX 270 am we.w cow'"

HARTFORD, CONNECTICUT 06141-0270 l

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$ 2s [lyl jff, (203) 66s-s000 l

l August 3,1987

-J Docket No. 50-336 B12630 Re: 10CFR 50.90 U.S. "'uclear Regulatory Commission Attn: Document Control Desk Washington, D.C. 20535 Gentlemen:

Millstone Nuclear Power Station, Unit No. 2 I

Proposed Change to Technical Specifications Control Room Habitability Pursuant to 10CFR50.90, Northeast Nuclear Energy Company (NNECO) hereby j

proposes to amend its Operating License DPR-65 by incorporating the attached l

changes into the Technical Specifications for Millstono Unit No. 2.

The proposed change, included as Attachment (1) to this letter, consists of a new f

Surveil!ance Requirement (Section 4.7.6.2.e.3) which is being added to 4

page 3/4 7-17. This new surveillance requirement snecif.ies that every 18 months (essentially each refueling outage) a test will be performed that demonstrates that, at a delta-pressure of 1/16" of water gauge, in-leakage of air into the l

control room js limited to lets thar,100 standard cubic feet per minute (scfm).

j This change is being proposed to support the control room ha'Oability,) evaluation performed for Millstone Unit No. 2. In a letter dated June 19,1985,u the NRC Staff issued Amendment No.100 to the operating license for Millstone Unit No. 2.

This amendment issued changes to the Technical Specifications that supported NNECO's evaluation of control room habitability in accordance with NUREG 0737, item II.D.3.4.

The NRC Staff Safety Evaluation, included in Reference (1), stated that an additional license amendment was necessary to include in the Technical Specifications a requirement to periodically verify the air in-leakage assumption made in NN CO's control room habitability analysis. In a letter dated December 10, 1986,(

NNECO committed to provide by August 3, 1987 a license amendment request to verify the ana'.ysis assumption. The license amendment request contained herein fulfills that commitment.

1 (1)

D. B. Osborne letter to J. F. Opeka, " Amendment No.100 to Facility l

Operating License No. DPR-65," dated June 19,1985.

(2)

E. J. Mroczka letter to.. C. Thadani, " Request for Additional Information, l

Reporting of SV and RV Failures and Challenges, Control Room Habitability, 3

Secondary Water Chemistry," dated December 10,1986.

' I 8708110357 870803

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i DR ADOCK 0500 6

U.S. Nuclear Regulatory Commission B12630/Page 2 August 3,1987 NNECO has reviewed the attached proposed change pursuant to 10CFR50.59 and has determined that it does not constitute an unreviewed safety question. The i

new Surveillance Requirement proposed herein provides an additional test.that ensures that a previously docketed analysis remains valid. with respect to all assumptions made. This proposed change does not increase the probability or

' l consequences of an accident previously analyzed nor create the potential for a new unanalyzed accident nor reduce the margin of safety as defined in the basis of any Technical Specification..The proposed change adds a.new Surveillance Requirement that helps to ensure that the current analysis for control room habitability remains valid.

i NNECO has reviewed the proposed change in accordance with 10CFR50.92 and has concluded that it involves no significant hazards consideration in that these changes would not:

1 1.

Involve a significant increase in the probability or consequences of an accident previously evaluated.

Since the proposed change provides an additional survelliance test not previously required, greater assurance of the continued validity of the control room habitability evaluation is ensured.

Therefore, there is no increase in the probability or ' consequences of an accident previously analyzed.

j 1

2.

Create the possibility of a new or different kind of accident from any 1

previously ar.alyzed. Again, due to the nature of this change as described above, no new accidents or malfunctions are created. This proposed change provides additional control and restriction over systems already in service at the plant.

)

l 3.

Involve a significant reduction in a margin of safety. As previously stated, this change will not adversely affect the margins of safety in existing specifications. This proposed change represents an addition to the Technicai l

l Specifications.

NNECO's conclusion that the three criteria of 10CFR50.92(c) are not compro-1 mised is supported by cur determination made pursuant to 10CFR50.59.

With respect to the proposed Technical Specification change, our review of the given examples in 51 FR 7750, March 6,1986, of amendments that are considered not likely to involve a significant hazards consideration has determined that example (ii), a change that constitutes an additional limitation, restriction, or l

l control not presently included in the Technical Specifications, is applicable. The l

proposed change institutes a new surveillance requirement which will help ensure the control room ventilation system performs as intended.

The Millstone Unit No. 2 Nuclear Review Board has reviewed and approved the attached proposed revisions and has concurred with the above determinations.

In accordance with 10CFR50.91(b), we are providing the State of Connecticut with a copy of this proposed amendment.

Pursuant to the requirements of 10CFR170.12(c), enclosed with this amendment request is the application fee of $150.

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U.S. Nuclear Regulatory Commission B12630/Page 3 August 3,1987 NNECO respectfully requests that this amendment be issued with an effective date corresponding to entrance into Mode 4 following -the upcoming refueling outage at Millstone Unit No. 2.

This outage is presently scheduled to begin in January 1988.. Compliance with the Limiting Condition for Operation (LCO 3.7.6,-

Control Room Emergency Ventilation System), based on the proposed new Surveillance Requirement, cannot be verified until the test is performed. This new surveillance test is to be conducted during refueling outa<;es, with the first test to be performed during the upcoming refueling outage. In order to perform this test, NNECO must procure some equipment and prepare some systems.

l Therefore, NNECO is hereby requesting that this proposed Technical Specification j

change not be effective until af ter the refueling outage to allow the necessary preparations for and the conduct of the initial test.

Very truly yours, NORTHEAST NUCLEAR ENERGY COMPANY

/YA 2A./

E. 3.'M rKczka

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Senioriice President l

I cc:

Kevin McCarthy Director, Radiation Control Unit Department of Environmental Protection Hartford, CT 06116 cc:

W. T. Russell, Region I Administrator D. H. Jaffe, NRC Project Manager, Millstone Unit No. 2 T. Rebelowski, Resident inspector, Millstone Unit Nos. I and 2 STATE OF CONNECTICUT)

) ss. Berlin i

COUNTY OF HARTFORD )

Then personally appeared before me, E. 3. Mroczka, who being duly sworn, did state that he is Senior Vice President of Northeast Nuclear Energy Company, a Licensee herein, that he is authorized to execute and file the foregoing information in the name and on behalf of the Licensees herein, and that.the statements contained in said information are true and correct to the best of his knowledge and belief.

LAAAnd 0 &>tte Motary Puby My Commission Expires March 31,1988 l