ML19260A204

Responses to NRC 790524 Interrogatories.Includes Info on Vulnerability of RCS to Stress Corrosion Cracking. Certificate of Svc Encl

ML19260A204
Person / Time
Site:	Fermi
Issue date:	09/24/1979
From:	Howell D CITIZENS FOR ENERGY & EMPLOYMENT
To:	NRC OFFICE OF THE EXECUTIVE LEGAL DIRECTOR (OELD)
References
NUDOCS 7911080169
Download: ML19260A204 (5)

Text

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RELM.D CORRESPONDENCE

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UNITED STATES OF AMERICA f g]c q . -

NUCLEAR REGULATORY COMMISSION g >

6 W W 3EFORE THE ATOMIC SAFETY AND LICENSING 30ARD In the Matter of )

THE DETROIT EDISON CCM2ANY Docket No. 50-341 (Enrico Fermi Atomic Power )

Flant, Unit 2) )

CITIZENS FOR EMFLOYMENT AND ENERGY (CEE)

RESFONSES TO NRC STAFF'S INTERROGATORIES Introduction On May 24,1979, the NRC Staff served a document entitled "NRC Staff's Written Interrogatories To Citizens For Employ-ment and Energy (CEE)" on Mr. David Hillar, as representative for CEE. CEE did not become aware of the NRC Staff's interroga-tories until Mr. Kim Siegfried contacted Mr. Henry J. McGurren, .

- Counsel for NRC Staff, on July 26, 1979. As a result of that contact Mr. McGurren forwarded to Mr. S 8 egfried, by U.S. mail, en Augus: 6,1979 a copy of the NRC Staff's interrega: cries.

Further ac-ion to answer these interrcgatories was delayed since necessary CEE members were unavailable until recently.

Pursuant to the Board's Order of March 21, 1979, CEE herewith submit respenses to the NRC Staff's interrega crie_s.

Interrocaterv i (C6-1)

( a) It is cc= men engineering knowledge that all stainless steel piping when utilized as ecolant piping is susceptible to stress ccrrosion cracking. The extreme pressure (600 - 1200 psi)

U and te=perature (300 - 800 F) that is associated with reac;cr 1295 165

p. 7921080 h

t coolant service accelerate the rate of stress corrosion cracking.

(b) Detroit Edison has made design modifications and other efforts to " minimize" the vulnerability of the reactor coolant system to the phenomenon of stress corrosion cracking.

The Applicant has also conducted a preservice examination of the reactor coolant system with ultrasenic testing, CEE centends that the current state of technology does not allow for the elimination of stress corrosion cracking. There are no materials that can be placed into service in this system and not be subject to stress' corrosion cracking. With the under-standing that this phenomenon will occur the system must be designed with a monitoring program in place, to insure discovery of stress corrosien cracks prior to actual leakage of coolant.

Interrocatorv 2 (C6-2)

(a) The scurces of radiation are 1) the ambient conditions in a nuclear plant, and 2) design basis avents suen as loss of coolant accident. The sources of heat would be 1) ambient conditions in a nuclear plant,and 2) fire.

The heat and radiat3 cn inherent to a nuclear facility will accelerate the rate of deterieration of the electrical cables. Oxidative deterioration is increased by higher temper-atures and ionizing radiation causes changes in the molecular structure of the electrical cables.

(b) Assumptiens made by CEE are. :) That all compenents cf the electrical cables undergo chemical exidatien. That the change in the chemical composition, as a result of the oxidation, decreases the ability of the electrical cables to withstand heat.

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2) That electrical cables subject to hich environmental temp-eratures deteriorate at a faster rate due to the increased rate of oxidation. 3) That the molecular stmeture of the electrical cables are changed by ionizing radiatier,. These changes decrease the ability of the cables to withstand heat and radiation normally present in a nuclear facility. 4) It is ccmmonly accepted, engineering, chemical and physical, knowledge that' heat and radiation increases the rate of deterioration of electrical cables.

Interrogatorv '3 (C14.1 a - n)

CEE respectfully submits that they lack the technical expertise to answer this interrogatory. To provide less than a complete answer to this interrogatory would be no less unsat-isfactory to the NRC Staff than it would be to CEE. CEE lack:

the staff and financing to dedicate itself to the research ef:' ort that would be required to answer this interrogatory. CEE does not take the position that the. e is no merit to Contention 14, but is not in a position that it can fully advocate this issue.

CITIZE E FOR ""_ YMENT AND ENER/

Sy -

/ , /7-David E. Howell 21916 John R Hazel Park, Michigan 48030 (313) 532-451)

!.t t - - a -j ror CEE State of Michigan )

County cf Oakland ) ss-Cavid C. Petzel , being duly swcrn, says:

I as a me=ber of CEE. I have read the foregoing Answers c interrogatories and they are true and correct tc the best of

=y kncwledge, information and belief 8 y' 2' #

David C. Pe;zel/

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gg UNITED STATES OF AMERICA & $

NUCLEAR REGULATORY CCMMISSION 2  ;

3EFORE THE ATCMIC SAFETv AND LICENSING 30A e 4

..n the Matter of ) e THE DETROIT ELIS0h COMPANY ) Docket No. 50-341 (Enrico Fer=1 Atomic Power )

Plant, Unit 2) )

CERTIFICATE OF SERVICE I hereby certify that I have this 24th day of Septe=ber, 1979, served the foregoing document entitled " Citizens For Employment ani Energy (CEE) Responses to NRC Staff's Interrogatories", by mr.iling copies thereof, by first class mail, postage prepaid and properly addressed, 'to the following persons:

Charles 3echhoefer, Esq Chairperson, Atomic Safety and Licensing Board U.S. Nuclear Regulatory Commission

. Washingten, D.C. 20555 Chairperson, Atc=ic Safety and Licensing Appeal 3 card Panel U.S. Nuclear Regulatory Cc==ission Washington, D.C. 20555 Richard 3 lack, Esq.

Office of the Executive Legal Director U.S. Nuclear Regulatory Cc= mission Washington, D. C. 20555 Mr. Delber: J. Hof!=an Supervisor, Frenchtown Township 2665 vivian Road Mcnroe, Michigan 48161 Harry Voight, Esq.

Le3oeuf, Lamb, Leiby & MacRae 1333 New Hampshire Avenue, N.W.

Washing;cn, D.C. 20036 Mr. Frederick J. Shen Atomic Safety And Licensing 3 card U.S. Nuclear Regulatcry Cc==ission Washing;cn, D.C. 20555 Dr. David R. Schink Depa- nent cf Ocer.cgraphy Texas A&M Universi y -

C ellege Sta:icn, Texas 77340 1295 168

Monroe County Library System j Reference Department -

3700 South Custer Road Monroe, Michigan 48101 Secretarf -

U.S. Nuclear Regulatory Commission Washington, D.C. 20555 Attn Docketing and Service Section Peter A. Marquardt, Esq.

The Detroit Edison Company 2000 Second Avenue Detroit, Michigan 48226 CITIZENS FOR EMPLOYMENT AND ENERGv Sy ci-~ /4 David E. Howell 21916 John R Hazel Park, Michigan 48030 (313) 542-4510 Attorney for CEE

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