ML20150B433

Clarifies Concerns Re Intake Screen Design as Related to safety-related Cooling Sys.Previous Staff Ltr Should Have Clarified Apparent Misconceptions Re Const of Intake Discharge & Dredging Sys

ML20150B433
Person / Time
Site:	Marble Hill
Issue date:	10/17/1978
From:	Brenner L NRC OFFICE OF THE GENERAL COUNSEL (OGC)
To:	Dattilo T METFORD & DATTILO
References
NUDOCS 7811010323
Download: ML20150B433 (2)

Text

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Thomas M. Datt110, Esq.

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404 East Main Street

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co In the Matter of Public Service Company of Indiana, Inc.

Wabash Valley Power Association, Inc.

(Marble Hill Nuclear Generating Station, Units 1 and 2)

Docket Nos. STN 50-546, STN 50-547

Dear Mr. Dattilo:

In a letter to the NRC Staff dated September 14, 1978, you raised concerns regarding alleged safety aspects of a modification to the Marble Hill intake screen design which was approved by the Staff on June 20, 1978.

Some of the details of your concerns are difficult for the Staff to understand.

However, they all appear to assume that the intake screens in the Ohio River are part of the safety-related cooling systems.

This assumption is incorrect.

The Staff's letter to you of June 20, 1978, clearly stated that the intake i

structure is not a safety-related system.

This matter is more fully discussed in Sections 2.4.2, 2.4.4, 2.4.5, 2.4.6, 2.4.9, 3.4.1, 3.4.2 and 9.2.3 of the Staff's Safety Evaluation Report (SER).

As described in the SER, the supply of water necessary for the safe shutdown and cool-down of the Marble Hill f acility is provided by the essential service I

water (" Ultimate Heat Sink") system.

It is this system that is designed to safety Category I standards.

In a letter to the Licensing Board dated September 18, 1978, you have added a concern regarding the dredging which will be necessary to construct the intake and discharge structures.

As the Staff has stated previously, the only matter still before NRC hearing boards relating to the Marble Hill construction permits is the radon issue.

However, the Staff will attempt to respond.

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. It appears that you mistakenly believe that the need to dredge and remove spoil materials is related to the recent modification to the intake screen design.

Actually, this is not a new matter at all, and was con-sidered in the Staff's Final Environmental Statement (FES).

(See Sections

4. 2.1, 4. 3. 2, 4.1.1. l(8) and 4. 5. 2 ( 7).

No conccrn was raised during the public hearings by SlV-SMJi or any other party regarding construction of intake and discharge structures and associated removal of dredge spoils.

Although your letter is only conc'erned with removal of the spoils (the dredging operation), it may interest you to know that the only aspect which was left open in the FES related to the ultimate disposal of the dredging spoils after renoval.

The Applicants have recently fulfilled the requirement in the FES (64.5.2(7)) to submit their plan for disposal of the spo11s, and the Staff has found their method to be acceptable.

(Copies of the correspondence were sent to you.)

I hope the above information adequately responds to your concerns.

If you wish to discuss the matter further with the Staff, please feel free to give me a call.

Sincerely, Lawrence Brenner Counsel for NRC Staff cc:

Richard S. Salzman, Esq., Chairman Joseph B. Helm, Esq.

Dr. John H. Buck Michael J. Wal ro, Esq.

Michael C. Farrar, Esq.

Atomic Safety and Licensing Elizabeth S. Bowers, Esq.

Board Panel Mr. Gustave A. Linenberger Atomic Safety and Licensing Walker C. Cunningham, Jr., Esq.

Appeal Board Dr. Quentin J. Stober Docketing and Service Section Robert Gray Harry H. Voigt, Esq.

Charles W. Campbell, Esq.

Peter F. Manning, Esq.

David K. Martin, Esq.

Ted R. Todd, Esq.

Ralph C. Pickard Mrs. David G. Frey Robert C. Slover David R. Vandeventer, Esq.

George A. Leininger, Jr., Esq.

J. Bruce Miller, Esq.

Mrs. Marie Horine