NRC-87-0259, Part 21 Rept Re Unqualified Kalrez Soft Seats Used in Feedwater Check Valves Supplied by Atwood & Morrill Co. Initially Reported on 871203.Soft Seats for Valves Replaced W/Soft Seats Using Parker Compound E692-75

Part 21 Rept Re Unqualified Kalrez Soft Seats Used in Feedwater Check Valves Supplied by Atwood & Morrill Co. Initially Reported on 871203.Soft Seats for Valves Replaced W/Soft Seats Using Parker Compound E692-75

ML20236Y102
Person / Time
Site:	Fermi
Issue date:	12/08/1987
From:	Sylvia B DETROIT EDISON CO.
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
CON-NRC-87-0259, CON-NRC-87-259, REF-PT21-87, REF-PT21-87-215-000 PT21-87-215, PT21-87-215-000, NUDOCS 8712110092
Download: ML20236Y102 (4)

Text

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B. Ralph Syfyla Grcup %ce President Detroit e CADO North Dme Highway wm Newport. Michigan 48166 (313) 586-4150 o

December 8,1987 NIC-87-0259 U. S. Iliclear Regulatory Commission Attn: Docunent Control Desk Washington, D. C. 20555

References:

1) Fermi 2 tiRC Docket Ib. 50-341 IEC License No. NPP-43 l I

2) Telephone Conversation from Mr. F. E. Agosti (Detroit Fdison) to Mr . P. R. Pelke (IEC Region TIT) , on Decenber 3,1987 (PIC-87-012)

Subject:

ICCFR Part 21 tbtification - Kalrez Soft Seat for Feedwater Check Valves i

Pursuant to the requirements of 1(CFR21.21(b) (2) , Detroit I'dison l Company notified the tEC on December 3,1987 (Reference 2) of a 10CFR Part 21 condition at Fermi 2. The specific coMition involved unqualified Kalrez soft seats used in feedwater check valves supplied by Atwood ard Morrill Company. ,

1 The attached information is being submittei in accordance with 1(EFR21.21(b) (2) and ICCFR21.21(b) (3) . Tf you have any additional questions, please contact Mr. Girija Shukla at (313) 586-4270. ,

1 Sincerely,

't L Enclosure cc: Mr. A. B. ' avis I Mr. E. G. Greenman I Mr. W. G. Rogers Mr. J. J. Stefano UShTC Region TII 99

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'8712110092 871208  !

PDR ADOCK 05000341  ;

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Enclosure to 1 tEC-87-0259 Page 1 l 1

3(CFR2.1__RFPLORf - KALREZ_JOET_JTAT MNI'ERTAL o 1(CFR21,21(b) (3) The written report requiral by this paragraph shall include, but need not be  !

limited to, the following information, to  ;

the extent known.

o 1(CFR21,211b) (3) (i) Name and address of the individual or individuals informing the Commission.

Messrs: F. E. Agosti (V. P. Illclear Engineering and Services) and G. S. Shukla (Licensing) 6400 N. Dixie Highway Newport, Michigan 48166 l

o 1(CFR21,21Lbll31Jiil Identification of the facility, the activity, or the basic component supplied for such facility or such activity within the United States which fails to comoly or ccntains a defect.

Facility: Fermi 2, Detroit Edison Company Basic Component: Kalrez Soft Seat Material for Feedwater Check Valves F;21F010A and B.

z o 10CFR21dbil3)liljil. Identification of the firm constructing j the facility or supplying the basic j component which fails to comply or I contains a defect. f l

Supplier of Basic Component: Atwood and Morrill Co. l i

1 o 10CFR2L21Jbll3)]Jyl Nature of the defect or failure to comply l and the safety hazard which is creata3 or could be created by such defect or failure to comply.

l The fex3 water piping consists of two twenty inch dianeter lines l from the feedwater heaters to the rea-tor. Each line includes l three containment isolation valves, one inboard and two g outboard, i The design temperature of the feedwater piping is 450 F.

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Enclosure to  !

TEC-87-0259 l Page 2 '

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> ' The sof t seat material used in the outboard isolation valves is a j Stilman conpound which is qualified for its intended use. The inboard isolation valves used Dupont compound Kalrez as their sof t ]

seating material. Recently, it has been discovered that the I Kalrez compound did not perform satisfactorily during qualification testing and thus is not qualified .for its interded use. Cetroit Edispn purchase specifications required a design temperature of 4507 for feedwater isolation valve sof t seats.

However, according to the recently obtained test report, Kalrez specinens were found to be damageg during testing when they were subjected to thermal aging at 475 F pressurized water for 362

. hours to sinulate 1.5 years of equivalent life.

l The Kalrez soft seats for the inboard feedwater check valves 3 B21F010A and B were designed ard supplied by Atwood ard Morrill l Company. Failure of the soft seat material for feedwater inboard

, isolation valves will not impact safe shutdown of the plant. In the event of a failure of the soft seat, the valve seating surface Stellite will provide additiona'. sealing which will minimize valve leakage. Furthermore, two a3ditional check valves of different soft seat material (Ethylene propylene rubber) are in series to prevent any substantial leakage. Nevertheless, a potential impact on off-site dose exists due to the potential for a loss of a fission product barrier. Therefore, this condition could create a substantial safety hazard.

o 10CFR21.21(b) (3) (v) The date on which the inforetion of such defect or failure to comply was obtained.

The date on which it was discovered that the Kalrez conpound is not qualified for its interded use is September 9,1987.

Deviation Event Report (DER) No.87-357 was prepared to evaluate this condition.

o 102B21 21(b) (3) (vil In the case of a basic component which )

contains a defect or fails to comply, the j number and location of all such components j in use at, supplied for, or being supplied l for one or more facilities or activities )

subject to the regulations in this part.

Two feedwater inboard isolation check valves B21F010A and B.

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Enclosure to NPC-87-0259 Page 3 o 10CFR21.21(b) (3) (viil The corrective action which has been, is  !

being, or will be taken; the name of the irdividual or organization responsible for the action; ard the length of tine that has been or will be taken to complete the action.

Kaltez cof t seats for feedwater check valves B21F010A and B have been replaced with soft seats using Parker compound E692-75. This replacement reterial has been tested by Wyle Laboratories and found to be qualified for this application.

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o lQ2E2L211bil3) (viii) Any a3vice related to the defect or failure to comply about the facility, activity or basic conponent that has been, is being, or will be given to purchasers or Licensees.

No advice has been received or expected from Atwocd and Morrill Co.

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