ML19323F646

Answers to Applicant 800219 Supplemental Interrogatories. Includes Info Re Amount & Danger of Hydrogen Gas & Combustible Gas Control Sys.Affidavit & Certificate of Svc Encl.Related Correspondence

ML19323F646
Person / Time
Site:	Waterford
Issue date:	04/24/1980
From:	Larry Jones GILLESPIE & JONES, OYSTERSHELL ALLIANCE, INC., SAVE OUR WETLANDS, INC.
To:	LOUISIANA POWER & LIGHT CO.
References
NUDOCS 8005290270
Download: ML19323F646 (5)

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.. .. April 24,1980 M'rp3 ggjagsposegyi,;g f,

'1h UNITED STATES OF AMERICA O/ 000 e

, NUCLEAR REGULATORY COMMISSION O , .

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BEFORE THE ATOMIC SAFETY & LICENSING BOARD Otgfg & sans8 4 In the Matter of

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LOUISIANA POWER & LIGHT COMPANY Docket No. 50-382 (Waterford Steam Electric Station Unit 3)

• JOINT INTERVENORS ANSWERS TO APPLICANTS SUPPLEMENTAL INTERROGATORIES Now before the Atomic Safety & Licensing Board comes, Joint Intervenors, Oystershell Alliance, Inc. and Save Our Wetlands, Inc., and give answer to Applicant's Supplemental Interrogatories, dated February 19,1980, as follows:

28-1 1000-1300 pounds of hydrogen gas. This figure was the amount generated in the primary system at Three Mile Island, Unit 2. The estimate is based on inadequately cooled zircoloy cladding combining with the oxygen in the reactor cores' steam to form hydrogen (Kemeny Commission Report, p. 30).

28-2 " Dangerous quantities" of hydrogen are those that could press the cooling water below the core or generates an ' explosive' mixture of oxygen.

Overheating can occur in the core in many ways. Cladding material reacts 1

with steam to release hydrogen. I 28-3 Section 6.2.5 of the FSAR does not adequately provide plans for the elimination of dangerous hydrogen quantities in the following areas:

(1) Containment Hydrogen Indication 2.1.9 of " Discussion of Lessons Learned Short Term Requirements."

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April 24,1980 (2) Dcdicated H2Control Nnctrations 2.1.5a of the same reference.

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(3) The Combustible Gas Ccntrol System is designed to control a 4%

cladding reaction (FSAR 6.2.5.3(b)]. This gives an error factor of 5 over the accident design level of 10 CFR 50.46(3). However, Three Mile Island, Unit 2 suffered cladding failure of 44 -63 (Kemeny Commission Report, page 30). The CGCS is underdesigned, therefore, by an order of magnitude.

Respectfully Submitted,

• GILLESPIE e ONES .

BY < A Y

N L.fD , JR.

1 V.eteran- vd., . ite 201 tairie, Le f iana n 0005 (504) 835 < 58

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April 24,1980 STATE OF LOUISIANA PARISII OF JEFFERSON BEFORE ME, the undersigned, did appear GARY L. GROESCH, a person of the full age of majority and a resident of the Parish of Orleans, who did declare on oath that the Answers provided herein to Applicant's Supplemental Interrogatories are true and correct to the best of his knowledge, information and belief.

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Aw GARYj6. GROESGir Swma to and subscribed before me, Notary, this 24th day o April,1980.

,OTMfY PUBLIC f

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UNITED STATES OF AMERICA NUCLEAR REGULATORY COMMISSION In the Matter of LOUISIANA POWER AND LIGHT COMPANY DOCKET NO. 50-382 (Waterford Steam Electric Station Unit 3)

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CERTIFICATE OF SERVICE I hereby certify that on April 24, 1980, I mailed copies of Save Our Wetlands, Inc. and OystershcIl Alliance, Inc.'s, JOINT INTERVENORS ANSWERS TO APPLICANT'S SUPPLEMENTAL INTERROGATORIES to all individuals or entities appearing on the attached Service List, postage prepaid, first class in the United Stam ail.

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SERVICE LIST Sheldon J. Wolfe, Esquire U.S. Nuclear Regulatory Commission Atomic Safety and Licensing Board Panel Washington, D. C. 20555 Dr. Harry Foreman Box 395, Mayo University of Minnesota 55455

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Dr. Walter H. Jordan 881 West Outer Drive Oak Ridge, Tennessee 37830 Chairman, Atomic Safety and Licensing Board Panel U.S. Nuclear Regulatory Commission Washington, D. C. 20555 i Chairman, Atomic Safety and Licensing Appeal Board U.S. Nuclear Regulatory Commission Washington, D. C. 20555 Docketing and Service Section '

Office of the Secretary U.S. Nuclear Regulatory Commission Washington, D. C. 20555

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IIenry J. McGurren, Esquire Office of Executive Legal Director U.S. Nuclear Regulatory Commission Washington, D. C. 20555 George F. Trowbridge, Esquire

& IIarry J. Glasspiegel, Esquire  ;

Shaw, Pittman, Potts & Trowbridge 1800 M Street, N. W. l Washington, D. C. 20036 W. Malcolm Stevenson, Esquire l

Monroe & Lemann Whitney Building 625 Gravier Street New Orleans, Louisiana 70112 i

Stephen Irving, Esquire One American Place, Suite 1601 Baton Rouge, Louisiana 70825 l

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