ML20214E624

Part 21 Rept Re Design of Extension Bonnets Supplied in 1980 for Four Pressurizer Spray Valves.Thielsch Engineering Assoc Retained to Inspect & Make NDE of Welds

ML20214E624
Person / Time
Site:	Calvert Cliffs
Issue date:	05/07/1987
From:	Lombardi M INTERNATIONAL TELEPHONE & TELEGRAPH CORP.
To:	Lemmons J BALTIMORE GAS & ELECTRIC CO.
References
REF-PT21-87-102-000 PT21-87-102, PT21-87-102-000, NUDOCS 8705220171
Download: ML20214E624 (3)

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. , g ITTCorporation -

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~ - - - - - - Fluirl TeCimology Group

, P.O. Box 200

Midland Park, New Jersey 07432 -

' Telephone (201) 444 6030 i

May 7,:1987; -

EXPRESS MAIL Mr.'Jamesl$mmons=

Nuclear Power Manager

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L BALTIMORE GAS 5- ELECTRIC CO! PAW -

Calvert Cliffs Nuclear Power Plant-Lulsby Post Office.

Luisby,;hhryland 20657 Re: (1) Baltimore Gas 4 Electric' Company Calvert Cliffs Station 3",1500 lb.. Angle Control Valves (2) lbmmel Dahl Letter dated April 30, 1987

Dear Sir:

As counsel for ITT Fluid Technology Corporation (fonnerly ITT Grinnell Corporation), I received the enclosed communication from Peter C. Martin, Executive Vice President, Hammel Dahl, Inc., on May 5, 1987.

The letter indicates that 11ammel Dahl determined that a. defect exists

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in the design of the extension bonnets supplied in 1980 for four pressurizer spray valves for the subject plant. As you may be aware, ITT Grinnell sold flammel Dahl in December,1983. Accordingly, all the ' design data, information,-

and expertise relative to the subject valves resides with the llamel Dahl, Inc.

Ilowever, to assist in the evaluation of the valves, we have retained Thielsch Engineering Associates to inspect and make non-destructive examinations n of the welds. This inspection is being performed this week and a report is' '

anticipated next week.

Requests for further information relative to the 11amnel Dahl determination should be directed to Peter Martin. On an urgent basis, I would also ask that a copy of the ' data and any assumptions. supporting-the determination be forwarded. to Helnut 7hicisch for review and comment in view of the inspections being performed.'

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Mr. James Irmmons.-

ISLTIMORE GAS 6 ELECTRIC CO! PAW PageL-2 A copy. of. the Thicisch report will be submitted for your consideration. '

as soon as'it-is received.

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Very truly yours,

~ ITr. FLUID TECl 'OL

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tenotti J.'Lombardi, Esq.

i hDL:kl Enclosure.

cc: M. E. Roberson.

Baltimore Gas 6 Electric Company

' Edward Lit Jord50 U.S. Nucicar Regulatory Commission IIelmut Thielsch Thicisch Engineering Associates, Inc.

Peter C. hbrtin llammel Dahl, Inc.

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...f, HECEIVED pc.

[.:7%'~,.[. , . ,' M4Y 0 h 1981 HAMMEL DAHL, INC.

V ** ~ - 175 Post Road, VVanvick, RI O2888 '

., M. J. LOMBARDI goy 787.e200

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G.nw w - P.C. Martin Executive Vice President April 30, 1987 y .

x-Mr. Minotti Lombardi ITT Fluid Technology Corp.

Midland Park, New Jersey 07432

Dear Mr. Lombardi:

Our notice to you dated 4/23/87 stated that we, Hammel Dahl, Inc., were undertaking an engineering review to determine if there is a design defect in valves presently installed in a safety related system at the BG6E Calvert Cliffs Nuclear Power Plant, i.

Please be advised we have determined that according to the drawing in our file, there is a defect in the design of the extension bonnets supplied in 1980 for the four pressu-rizer spray valves. Since ITT is the manufacturer of these products, we are advising you of our determination. Further study is necessary to determine if there is a defect in the actual parts manufactured.

We understand that you have hired a consultant to start analysis irmnediately and that he has scheduled a visit to the power plant on May 4 and 5. This is important since we understand that both units of the plant are presently shut down. We would very much appreciate receiving a copy of the report outlining the results of your study so we might complete our file on this matter. In addition, if you deter-mine a defect does exist, we would expect you or your agent to notify the N.R.C. under regulation 10CFR part 21.

Should you have any further questf.nns on this, please contact me at the above location.

Yo. tr lLy,

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0 Peter C. Martin Executive Vice President l PCM:rgp cc: D. McKenney, Esa.

H. Thielsch i

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