ML19308D658
| ML19308D658 | |
| Person / Time | |
|---|---|
| Site: | Crystal River  |
| Issue date: | 06/11/1976 |
| From: | Rodgers J FLORIDA POWER CORP. |
| To: | Moseley N NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| Shared Package | |
| ML19308D659 | List: |
| References | |
| NUDOCS 8003120711 | |
| Download: ML19308D658 (2) | |
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e Mr. Norman C. Moseley, Director U. S. Nuclear Regulatory Commission Region II 230 Peachtree Street, NW Suite 818 Atlanta, Georgia 30303 Re_: Docke.t Nc. 50-302
Dear Mr. Moseley:
Pursuant to 10CFR50.55(e), we wish' to follow. up our written notification of April 21, 1976 regarding a separation in the concrete of the Crystal River Unit #3 containment structure dome.
Attached is our interim report entitle, " CRYSTAL RIVF" #3 DOME DELAMINATION REPORT", dated June 11, 1976. This report addressesi l.
Introduction 2.
Original Structure 3.
Problem. Definition 4.,
Delamination Structure 5.
Corrective Action 6.
References 7.
Quality Assurance During the investigation and evaluation; period, we have h: d beneflt of informal staff discussions on two occassions and numerous exchanges of staff and ACRS Members reported concerns. This interim report addresses each of these concerns to the extent our present information and expertise allows at this time.
The included evaluation does not providg any reasonable direction as to why the delamination occurred.
Our report includes a proposed corrective action in Section 5.
We feel that further theorizing as ta "why" will be.inconclus.'.ve and time consuming. We are, therefore, prepared to proceed with the cor' receive action as entirely adequate to assure that the containment structu e, when so repaired, will be capable of meeting the original design criteria as demonstrated by calculation and the Structural Integrity Test (SIT).
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General Office 3201 TNrty fourtn Street soutn. P O. Box 14047. St. Petersburg. Florca 33733 e 813--866 5151
Mr. Ncrman C. Marcicy Junn 11, 1976 2
We are very cognizant of staff concerns for the detensioning activity proposed and have incorporated in the report our response to these concerns. In this regard, development of detailed work procedures addressing the repair effort de a' ailable to I&E inspectors at the site or is. ongoing and will be m v
forwarded to the Commt.
.on directly as required.
It has been concluded by Florida Power Corporation from all evaluations available to us at this time, that the proposed corrective action is a correct and reasonably risk-free approach to an acceptable repair.
We, therefore, propose to begin work activities associated with the proposed corrective actions outlined on June 15, 1976 in accordance with the att ached schedule. Assuming no adverse occurrences, we will proceed toward ultimate conclueion of this work on this schedule.
To allow you and ourselves the opportunity for continued cooperation, exchange of questions and our responses, we request an informal session in Bethesda on June 18, 1976. At the close of this session, we would solicit your concurrence with our corrective action and the proposed work schedule.
If you have any questions concerning our filing or the subsequent meetings with the Connission, please advise us.
Very truly yours, l
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J. T. Rodgers Asst. Vice President
'JTR:pam cc:
E. Volganeau L. Engle CR-3 w/40 attach.
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