ML20148B494

Requests to Be Kept Informed Re Progress & Resolution of Possibility of Threats to Safety of Nuclear Power Plants Due to More Rapid than Expected Embrittlement of Pressure Vessel Supports from Radiation at Low Temps

ML20148B494
Person / Time
Issue date:	03/15/1988
From:	Kerr W Advisory Committee on Reactor Safeguards
To:	Zech L NRC COMMISSION (OCM)
References
ACRS-R-1290, NUDOCS 8803210536
Download: ML20148B494 (1)

Text

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~,, UNITED STATES

! , g NUCLEAR REGULATORY COMMISSION

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O j ADVISORY COMMITTEE ON REACTOR SAFEGUARDS WASHINGTON, D, C. 20655

%,*..../g 3 March 15, 1988 i

The Honorable Lando W. Zech, Jr.

Chairman U.S. Nuclear Regulatory Comission Washington, D.C. 20555

SUBJECT:

ACRS COMMENTS ON EMBRITTLEMENT OF STRUCTURAL STEEL There has been a recent exchange of letters between the ACRS and the NRC a concerning the possibility of threats to the safety of nuclear power plants due to the more rapid than expected embrittlement of pressure vessel supports from radiation at low temperatures. During the 335th meeting of the ACRS, March 10-12, 1988, we heard presentations from the NRC Staff on its further evaluation of this matter. Our Subcomittee on Metal Components met on February 18, 1988 to discuss this matter.

i 1

We believe that the program the NRC Staff is undertaking to resolve this  !

, matter is appropriate. There are clearly important uncertainties  !

remaining but the effort being implemented thould generate the informa-  ;

9 tion needed in a timely manner. We would like to be kept informed on the progress and resolution of this matter.

Sincerely, William Kerr i Chairman l

2

References:

j 1. Letter dated July 15, 1987 from William Kerr, ACRS Chairnan, to '

Victor Stello, Jr. Executive Director for Operations,11.5. NRC,

Subject:

ACRS Coments on the Embritt ement of Structural Steel l

2. Memorandum dated October 7, 1987 from Victor Stello, Jr., Executive Director for Operations, U.S. NRC, to William Xerr, ACRS Chairman,

Regarding the Embrittlement of Structural Steel

3. Letter dated December 8,1987 from William Kerr, ACPS Chairman, to Victor Stello, Jr., Executive Director for Operations U.S. NkC, s

Subject:

ACRS Coments on Memorandum from Victor Stello, Jr., EDO, i dated October 7, 1987 Regarding the Embrittlement of Structural i

, Steel r

8803210536 000315 PDR ACRS 1290 PDR

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