ML20099E249

Forwards Summary of Commitments Re NUREG-0737,Item III.D.3.4 Re Control Room Habitability

ML20099E249
Person / Time
Site:	Crane
Issue date:	11/14/1984
From:	Hukill H GENERAL PUBLIC UTILITIES CORP.
To:	Stolz J Office of Nuclear Reactor Regulation
References
RTR-NUREG-0737, RTR-NUREG-737, TASK-3.D.3.4, TASK-TM 5211-84-2257, NUDOCS 8411210189
Download: ML20099E249 (4)

Text

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GPU Nuclear Corporation Nuclear-

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Middletown, Pennsylvania 17057-0191 717 944 7621 TELEX 84 2386 Writer's Direct Dial Nurnber:

November 14, 1984 5211-84-2257 Gifice of Nuclear Reactor Regulation Attn:

J. F. Stolz, Chief Operating Reactor Branch No. 4 Division of Licensing U.S. Nuclear Regulatory Commission Washington, DC 20555

Dear Mr. Stolz:

Three Mile Island Nuclear Station Unit 1 (TMI-1)

Operating License No. DPR-50 Docket No. 50-289 Control Room Habitability (III.D.3.4 NUREG 0737)

GPU Nuclear Corporation has made several submittals on this subject. The most recent letter of April 30,1984 (H. D. Hukill to J. F. Stolz) reflects

.the results of design evolution and detailed analysis and represents current GPUN position on this issue.

In order to assure that there is no confusion on this matter, it is the intent to consolidate and summarize the GPUN commitments on Control Room Habitability (III.D.3.4 NUREG 0737). lists those commitments and reference to the appropriate letter.

This letter is provided for your infonnation only; there is no action required.

Sincerely, H. D.

ukill l

birector, THI-1 l

MI: dis Enclosure-1 kk D C

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P GPU Nuclear Corporation is a subsidiary of the General Public Utilities Corporation 1

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Enclesure 1

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GPUN Letter #LIL 323. H.D. Hukill to J. F. Stolz, ' dated Nov. 9,.1981 Commitment Status ~

Comunitment #1 The isolation dampers in the outside air intake, exhaust air Commitment has been revised to-Attach 1 outlets and.the non-safety zone of the control building.

reflect the results of recent :

Sec. II.3.A elevation 306'-0" will be Leakage Class I, Construction analysis. For details'seel 1st. Para.

Classf B dampers established-in ASME/ ANSI-N-509 and will GPUN Letter f5211-84-2099.

Meet the leak test requirements established in H. D. Hukill to J. F. Stolz-ASME/ ANSI-N-510.

dated April 30, 1984..

s-Connitment #2

.The_CBVS' emergency configuration will operate manually from.

.No change in position....

1 Attach. I the control room under all emergency operating. conditions which Commitment.has been revised" SRP 6.4, Rev. 1 includes postulated airborne radioactivity and postulated to reflect results off recentL See II.3.b toxic chemical release.

Isolation damper position'will be analysis. Only chlorine gas 1st Para.

automatic in accordance with.. signals from the TGDS, RDS,

" detection'is required. See air intake tunnel device, or engineered safeguards Systems.

letter of April - 30,11984. for.

. clarification..

Commitment #3 The filtration subsystem includes four'(4) redundant Revised commitment based on Attach. I pneumatically operated isolation dampers in the outside air!

most recent analysis and. tests.

SRP 6.4 intake which are opened during postulated radiological See letter of April 30,11984.

Sec. II.3.b releases.

2nd Para.

Commitment #4 Four. (4) redundant pneumatically operated isolation dampers Commitment revised based on-Attach..I will be provided in the exhaust air outlet.

most'recent analysis'and' tests..

SRP 6.4-

See letter of April 30, 1984.

Sec, II.3.b 3rd Para.

Co uitment #5 Quick-acting Toxic Gas Detectors.-

Commitment revised based on

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Attach. 1 information provided in GPUN SRP 6.4 Letters of July 16,~ 1982 and-II.5.b(1)

April ' 30, 1984.

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. A:; 9 Commiitment.#6:

' Infiltration will be minimized by modification ofdhe '

Commitment $hised2

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. Attach.~1:

control building envelope to provide 0.06 air changes:

See;1etter of. April; 30fl984.

.?N SRP.

per hour when the C.B. is pressurized to + 1/8" WG.-

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.Sec. II.5.b(3)

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. Commitment #7 The TGDS' signal will automatically isolate-the control 1Commiitment revised.

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-Attache 1 building outside air-intake, exhaust. air outlet and thel LSee letter of:'Aprilc30,i1984..

R.G. 1.78-non-safety zone of the C.B. el. 306'-0" and will alarm and!

-Sec. C.3 annunciate in the control room.

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Commitment #8 Five. (5)'self contained breathing apparatus ((5CBA).will be '

.'No Change;

-Attach.-l' in. place in the control room. 'Each SCBA has a minimum of-J

,1

.R.G. 1.78-two spare bottles stored at TMI-1. :Also there;is an airn

'Sec. C.14-compressor and Cascade System onsite for unlimited air' l.

l3rd Para.

supply.

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Cosmiitment #9 The detector response time will be equal to or less than :

'rNo1 Change 1

4 3

Attach. 1-

10. seconds based on chlorine detection.of 5 ppe at the:

See letter. of: April 30,31984.

RG 1.95 Rev 1

. isolation damper location.

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Sec. C.3.a(1)..

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' Commitment #10 The CDS will consist of two (2) redundant units and'

['Nolchange:1npositionifor?

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Attach.= 1 physically separate to accomplish decoupling of thi revised detector location.: ;m<

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RG 1.95 Rev 1.

effects of unsafe environmental factors....

1See [etter of Apri1130.11984.

i Sec. C.4.d(3)

Ist Para.

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B)

Letter f 5211-82-167, H. D. Hukill to J. F. Stolz dated July 16,'1982-

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a Commitment #11

-Install low leakage isolation dampers-for CB. Emergency Zone.:

.Comuniiment resised based [oni

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s Attach. 3 6most'recent' analysis..,

Item I See letter:of April;30,.1984 3 Commitment #12 Perforin leak tightness test on control. building Emergency Attach. 3 zone boundary and upgrade if necessary.

Test completed f4

See letter of' April; Item 2 30,;1984?

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Lettcr f5211-84-2056 H. D. Hukill.tm J. F. Stolz dated March 2 1984-z.:

Commitment #13

• Provide an estimate and schedule for the engineering.

Commitment' revised 3rd Para.

design.and installation of isolation dampers, and. Toxic ?

-See letter'of April 30, 1984 " -

Gas Detection System in the C.B.V.S.

• Issue engineering package-for installation by July.1985.

Following are the commitments for on-site Hazards, stated in the letter of April: 30 -1984, reiterated here for your information.

D)

Letter f5211-84-2099 H. D. Hukill to J. F. Stolz dated April 30, 1984:

Commitment #14

• Dike around NH 0H tank--completion by January 1985 2

Item A

• Institute an administrative procedure to govern the 1st & 2nd Para. movement of the truck to assure that the truck will remain as far away from the air intake structure as. practical..

Commitment #15

• GPUN will install redundant chlorine detectors at the'

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Item B river water _ pump house and air intake structure--issuance of:

1st & 2nd Para. construction package by March 1985.

• GPUN will institute-administrative procedures to control chlorine deliveries.

1 Commitment f16 Failure Mode and Effect Analysis (FMEA) will be performed.

Last page.of GPUN will inform NRC. of the results:.of FMEA by November 1984.

the letter 2nd Para.

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Commitment #17 GPUN plans to increase the leak. tightness of the protected Last page of zone including.the control room by adding seals and gaskets, the letter if UL rating is not affected.

3rd Para.

n

• GPUN's current position which supersedes previous commitments.

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