ML20054M943

Affidavit of Aw Serkiz Re Dekalb Area Alliance for Responsible Energy/Sinissippi Alliance for Environ Contention 9(a).NRC Has Not Completed Evaluation of Krsko Plant Water Hammer Event.Certificate of Svc Encl

ML20054M943
Person / Time
Site:	Byron
Issue date:	07/09/1982
From:	Serkiz A Office of Nuclear Reactor Regulation
To:
Shared Package
ML20054M926	List: ML20054M925 ML20054M928 ML20054M933 ML20054M941 ML20054M943
References
NUDOCS 8207150176
Download: ML20054M943 (4)

Text

'

l l

UNITED STATES OF AMERICA NUCLEAR REGULATORY COMMISSION 1

BEFORE THE ATOMIC SAFETY AND LICENSING BOARD In the Matter of )

COMMONWEALTH EDIS0N COMPANY Docket Nos. 50-454

) 50-455

, (Byron Station, Units 1 and 2) )

SUPPLEMENTAL AFFIDAVIT OF ALECK W. SERKIZ REGARDING DAARE/ SAFE CONTENTION 9(a)

1. I, Aleck W. Serkiz, being duly sworn, state the following. I am a Senior Task Manager in the Generic Issues Branch, in the Office of Nuclear Reactor Regulation, U.S. Nuclear Regulatory Comission. A copy of my professional qualifications is already on file in this proceeding.

2. The purpose of this affidavit is to supplement my affidavit on DAARE/ SAFE Contention 9(a), which accompanied the Staff summary disposition motion of June 4,1982, to account for new information first provided in Commonwealth Edison's sponsored affidavits of Leslie A. Bowen, Richard Pleniewicz, and Robert W. Carlson, which were filed on June 7 following my affidavit.

3. These affidavits, particularly that of Robert W. Carlson, refer to a water hammer event believed to have occurred at the KRSK0 Nuclear Power Plant in Yugoslavia during hot functional testing in July 1981 and cite examinations revealing small permanent displacement of some feedwater bypass piping and some bulging in the area of the secondary shield wall. Discovery of damage is given as August 1981.

820715o176 020714 PDR ADOCK 05000454 G PDR

. s 4 The Staff does not have precise details of the KRSK0 plant occurrence. Efforts are underway to obtain such information, as well as damage inspection details, plant operating s conditions and corrective measures taken. Therefore, the Staff has not determined the applicability of this event to Byron, specifically, or, generically to other domestic plants utilizing type D steam generators. . a,

5. Whereas the KRSK0 event indicates that a water hammer (or steam bubDie collapse) can occur in a preheat model steam generator, preoperational testing of a preheat steam generator'in the McGuire Plant (instrumented for detecting steam bubble collapse) did not reveal water hammer occurrence (as noted in my June affidavit).

Generic evaluations of water hammer occurrences show a randomness of occurrence, many of the water hammer occurrences being in the preoperational phase. Thus, both generic, and plant-specific assessments of the relative significance of the KRSK0 event will be made upon receipt of information requested from the Applicant and Westinghouse concerning this event. Neither the U.S.

occurrences (where principal damage has been to pipe hangers, snubbers and pipe movement), nor the KRSK0 event, have resulted in failure of the pressure ? mnAry (except the Indian Point-2 event in 1973). Additi W:4 /, release of radioactive material has been attributed to any water wcmer event in the U.S.

6. The adequacy of the water hanner protection features will be verified during preoperational testing as noted in section 10.4.7 of the Byron SER, with which I concur and hereby cdopt as part of my testimony on contention 9(a).

As further noted in Section C.5(A-1) of the Byron SER, in the event that significant water hammer scenarios are identified in the course of resolving Task A-1, (water haniner), which have not been explicitly accounted for in the design and operation of Byron, corrective measures will be required at that time.

7. Therefore, along these lines, the Applicant's intent (as noted in the affidavit of Leslie A. Bowen) to instrument for detection of steam pocket formation, and alerting the operators, appears a prudent step for identifying potential conditions which might result in a water hammer event. Pending our evaluation of the KRSK0 event , we have not identified a need for requiring any additional measures beyond those already noted in the Byron SER.

M O. *k 3

Aleck W. Serkiz Subscribed and sworn to before me this og day of July,1982.

4.(MEF34 h44 Notary PubTic w NdhK 7 I 0[0 d.

.I 9 ,

i:

My Comission expires: 7 /i / 8fo fl

' UNITED STATES OF AMERICA NUCLEAR REGULATORY C0411SSION BEFORE THE ATOMIC SAFETY AND LICENSING BOARD _

)

In the Matter of Docket Nos. 50-454 COMMONWEALTH EDIS0N COMPANY 50-455

)

(Byron Station, Units 1 and 2) )

CERTIFICATE OF SERVICE I hareby certify that copies of "NRC STAFF RESPONSE TO APPLICANT'S .

FOR

SUMMARY

DISPOSITION ON THE PLEADINGS" in the above-captio have been served on the following by deposit in the United States mail, first clas, or, as indicated by a single asterisk, by deposi double asterisks, by express mail, this 14th day of July, 1982:

Mrs. Phillip B. Johnson

• Morton B. Margulies, Chairman 1907 Stratford Lane Administrative Judge Rockford, Illinois 61107 Atomic Safety and Licensing Board U.S. Nuclear Regulatory Commission ** Ms. Diane Chavez Washington, DC 20555 608 Rome Avenue Rockford, Illinois 61107

• • Dr. A Dixon Callihan Administrative Judge Dr. Bruce von Zellen Union Carbide Corporation c/o DAARE P.O. Box Y P.O. Box 261 Oak Ridge, Tennessce 37830 DeKalb, Illinois 60015 i *Dr. Richard F. Cole

• Atomic Safety and Licensing Board Panel i

Administrative Judge U.S. Nuclear Regulatory Commission Atomic Safety and Licensing Board Washington, DC 20555 U.S. Nuclear Regulatory Comission Washington, DC 20555

• Atomic Safety and Licensing Appeal Board Panel

, ** Paul M. Murphy, Esq. U.S. Nuclear Regulatory Commission Isham, Lincoln & Beale Washington, DC 20555 Three First National Plaza Chicago, Illinois 60602

• Docketing and Service Section Office of the Secretary of the Commission

• • Myron M. Cherry, Esq. U.S. Nuclear Regulatory Commission Cherry & Flynn Washington, DC 20555 i

Suite 3700 Three First National Plaza Chicago, Illinois 60602 l

Region III j l U.S. Nuclear Regulatory Commission Office of Inspection & Enforcement

< Q g dq j Steven C. Goldberg '

799 Roosevelt Road Glen Ellyn, Illinois 60137 Counsel for NRC Staff