NG-95-3362, Provides Info Re Resolution of Thermo-Lag Installations at DAEC

Provides Info Re Resolution of Thermo-Lag Installations at DAEC

ML20094S386
Person / Time
Site:	Duane Arnold
Issue date:	12/01/1995
From:	Franz J IES UTILITIES INC., (FORMERLY IOWA ELECTRIC LIGHT
To:	Russell W NRC (Affiliation Not Assigned), NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NG-95-3362, NUDOCS 9512060160
Download: ML20094S386 (4)

Text

i IES Uttilbs Jnc.

2CD first Street SE.

Po. Box 351 Cedar Ratads, IA 52406-0351 Telephone 319 398 8162 Fax 319 398 8192 UTILITIES Voce President, Nuclear December 1,1995 NG-95-3362 Mr. William T. Russell, Director Office of Nuclear Reactor RegulaGon U. S. Nuclear Regulatory Commission Attn: Document Control Desk Mail Station Pl-37 Washington, DC 20555-0001

Subject:

Duane Arnold Energy Center Docket No: 50-331 Op. License No: DPR-49 Follow-up Information in Response to NRC Generic Letter 92-08

Reference:

1) Letter, Franz (lES) to Russell (NRC), dated June 30,1995, j

NG-95-2074

2) Letter, Franz (IES) to Russell (NRC), dated September 1,1995, NG-95-2644 j

File:

A-101a, P-72a

Dear Mr. Russell:

This letter provides further information regarding resolution of Thermo-Lag installations at the Duane Amold Energy Center (DAEC). The attachment to this letter contains summary information updating the plans and schedules originally communicated in References 1 and 2. Additional information is available at the DAEC for review by your staff.

This letter closes commitments made in Reference 1, Schedule Items 7 through 10 and the commitment made in Reference 2. This letter commits to submitting an exemption i

request by June 28,1996.

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9512060160 951201 I

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' Mr. William T. Russell NG-95-3362 l

December 1,1995 i

Page 2 of 2 I

l Should you have any questions regarding this matter, please contact this ofrice.

This letter is true and accurate to the best of my knowledge and belief.

i IES UTILITIES INC.

By-W, Jgp,' Franz'

/

Vice President, Nuclear i

State oflowa i

(County) of Linn 1

Signed and sworn to before me on this 49-day of

' 1995, b)L L/

0 A n w>v Notaryptic in and for the State ofIowa nAa)dfi /GGS l

Commission Expires 1

Attachment:

lES Utilities Integrated Thermo-Lag Resolution Schedule JFF/LBS/lbs N %wa\\ Licensing \\NG-95\\95-3362. doc I

cc:

L. Swenzinski L. Liu i

B. Fisher 1

G. Kelly (NRC-NRR) l

11. Miller (Region 111)

NRC Resident Office Docu t

9-

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Attachment to NG-95-3362 Page1of2 t

IES Utilities Integrated Thermo-Lag Resolution Schedule l

Scope of Alternate Barrier Testing in Reference 1, Schedule Item 7, IES committed to providing the scope and schedule of planned attemate material testing. In Reference 2, IES committed to providing this information by December 1,1995.

IES and Carolina Power and Light (CP&L) are cooperating in a test of the DARMATT KM-1 barrier system supplied by Transco Products, Inc. (Transco). The test configuration is similiar to that described during the May 18,1995 meeting ofIES, CP&L and the Washington Public Power Supply System with the NRC. IES intends to use the test data to support installation of DARMATT on drywell electrical penetrations.

DARMATT will replace Thermo-Lag on raceway installations 2A-4,2A-6,2A-7 and 2A-

10. The schedule is to test the DARMATT configuration during the week of December i

18,1995 and to have the final test report by February 28,1996.

1 This schedule item is complete.

Fire Area Barrier Modeling Evaluations i

In Reference 1, Schedule Items 8 and 9, IES committed to evaluate the need for Thermo-Lag coating on duct installation SS-9 and fire dampers FD-010, FD-012, FD-013, FD-016, FD-114 and FD-116. Evaluations were made in accordance with Generic Letter 86-10 Fire Area Banier Guidelines, and it has been determined that fireproofing is not required for these installations. These Thermo-Lag installations will be abandoned in place.

These schedule items are complete.

Field Verification Program i

in Reference 1, Schedule item 10, IES committed to developing a field verification program for Thermo-Lag installations which will be relied on for Appendix R compliance. This program has been developed using Generic Letter 92-08 and subsequent NRC correspondance as guidance in determining critical attributes for specific applications. As-built data is then gathered for each installation and used to determine the status of the critical attributes. It should be noted that the critical attributes for the different types ofinstallations used at DAEC vary widely. For example, spray on

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to NG-95-3362 Page 2 of 2.

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4-Thermo-Lag fireproofing used at DAEC has relatively few critical attributes compared to those for raceway barners.

j' IES participated in the recent chemical testing program of Thermo-Lag 330-1 perfonned by the industry. The test results indicate that Thermo-Lag has been consistently.

formulated and support the use of generic fire tests and other data developed by NEI and j

i others.

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IES is currently planning to maintain three Thermo-Lag installations at the DAEC for -

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Appendix R purposes: raceway fire barrier installation 16F-1, fireproofing installation j

SS-7 and wall installation SS-8. Field verification, as described above, will be performed

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for these installations.

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This schedule item is~ complete.

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l Change in Resolution Path for Raceway Barrier Application 16F-1 I

IES previously stated that the need for Thermo-Lag installation 16F-1 would be i

eliminated by c'ompletion of plant modifications. Due to low combustible loading in the-i fire area encompassing 16F-1, the resolution approach has been revised. Field r

verification will be performed for this installation. IES plans to submit an exemption i

request for this installation by June 28,1996. This activity is identified as Schedule Item 13.

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