ML20083L281

Informs That safe-end Dutchmen Sections Containing Cracks Will Be Sent to Anl for Sectioning & Metallurgical Insp. Subsequent Meeting to Be Held W/Interested Parties to Concur Re safe-end Investigation & Disposition Program

ML20083L281
Person / Time
Site:	Dresden
Issue date:	02/10/1975
From:	Abel J COMMONWEALTH EDISON CO.
To:	Fiorelli G NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20083L276	List: ML20083L281 ML20084E252 ML20084E259 ML20084E263 ML20084E266
References
NUDOCS 8010020863
Download: ML20083L281 (1)

Text

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Commonwea Cn* lit.t IJationat ~i . era. ChicaQO. Eno 5 Edison .

O 8.\ f*// Adore:,5 Reply to: Po!,1 Ollice box 767

~4 Chicago, Illinois 60090 February 10, 1975 Mr. Gaston Fiorelli, Chief Reactor Operations Branch Region III U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137

Subject:

Dresden Station Unit 2 Investigation of Core Spray Safe End Cracks NRC Dkt. No. 50-237

Dear Mr. Fiorelli:

• 1 A preliminary report concerning the subject crack was sub-mitted to you by letter from B. B. Stephenson dated February 6, 1975.

As indicated in that report, the safe end dutchmen sections con-taining the cracks will be removed. These sections will be sent in total to Argonne National Laboratory for sectioning and metallurgical investigation. This is expected to occur next week.

After the safe ends reach Argonne, the first step in the in-vestigation will be a complete NDE to determine the exact condition of the sections. The' estimated time for the NDE .is one week. Based on the NDE results, the remaining investigative program will be de-fined. A meeting will then be held at Argonne with all interested parties to concur in the program for investigation and disposition of the safe ends. We estimate the meeting will be held during the week of February 24. If you are interested in obtaining specimens from the safe ends for your evaluations, you are requested to pro-vide a written description of the specimens or participate in.the meeting at Argonne. Mr. D. P. Galle will notify your Mr. Johnson concerning the exact time and place of the meeting. If you prefer to send a written request, it should be sent prior to the meeting.

Should you desire to participate in the NDE, or if we can be

.of any further assistance in this matter, please contact this office.

j Vcry truly yours,

$'d/ m:

80]CO).Q 8 h J. S. Abel /

Huclear Licensing Administrator noilino unter Renctorn

UNITED STATES NUCLEAR REGULATORY COMMlf,SION REGION lit 799 HOOSEVELT ROAD GLEN ELLYN, ILLINOIS 60137 February 13, 1975 K. V. Seyfrit, Chief, Technical Assistance Branch, Office of Incpection and Enforectent,IIcadquarters COMMONWEALTli EDISON COMPA2 (DRESDEN 2)

DOCKET NO. 50-237 INVESTIGATION OF CORE SPRAY SAFE END CRACKS As discussed with you during several telephone communicatio >s, most recently on February 13, 1975, we are looking to your office to assume the lead in the technical evaluation of the safe ,end and 4" bypass pipe crack problens experienced at the various facilities in IE:III.

Commonwealth Edison Company in a letter to me dated February 10, 1975, and which was transmitted to you by faccimile on February 13, 1975, has formally requested to be appraised of NRC's participation in the evaluation program of the core spray safe end cracks at Dresden Unit 2.

Please provide us instructions by meno in regards to this matter co that a proper and timely response can be made.to the Commonuealth Edison Company.

If we can be of further assictance please contact myself or Mr. R. C. Kuop.

kyhawfWe-G. Fiorelli, Chief Reactor Operations Branch

Enclosure:

CE Response dtd 2/10/75 cc: B. II. Grier, IE:HQ J. G. Davis, IE:llQ =

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• C, Cne Int fiabonal Pl.aa Ctucaao. libnois I I.[5/ '/ AddreLL Reply to: Po Box 767 1 Othce Cnicago. !!hnois 60690

'@ February 10, 1975 1

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3 Mr. Gaston Fiorelli, Chief -

n i Reactor Operations Branch .

! Region III

' - U.S. Nuclear Regulatory Commission

[ 799 Roosevelt Road i Glen Ellyn, Illinois 60137 '

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Subject:

Dresdon Station Unit 2

.I Investigation of Core Spray ,

J.

Safe End Cracks NRC Dkt. No. 50-237 l

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Dear Mr. Fiorelli:

A preliminary report concerning'the subject crack vas sub-mitted to you by letter from B. B. Stephenson dated February 6, 1975.

l j As indicated in that report, the safe end dutchmen sections con-

]

taining the cracks will be removed. These sections will be cent in '

j total to Argonne National Laboratory for sectioning and metallurgical investigation. This is expected to occur next weck.

) After the safe ends reach Argonne, the first step in the in-1 vestigation will be a complete NDE to determine the exact condition I of the sections. The estimated time for the NDE is one week. Based I on the NDE results, the remaining investigative program will be de-

) fined. A meeting will then be held at Argonne with all interested l parties to concur in the program for investigation and disposition i

of the safe ends. We estimate the meeting will be held during the l week of February 24. If you are interested in obtaining specimens from the safe ends for your evaluations, you are requested to pro-vide a written description of the specimens or participato in the meeting at Argonne. Mr. D. P. Galle will notify your Mr. Johnson i concerning the exact time and place of the meeting. If you prefer to send a written request, it should be sont prior to the meeting.

Should you desire to participato in the'NDE, or if we can bc

.of any further assistance in this matter, plcacc contact-this office.

Very truly yours, i I A up'i gN!/' p;#:.M*]

s

' I J. S. Abel /

foi Nuclear Licensing Atlministrator Doiling Water Reactors i

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