ML19317E951
| ML19317E951 | |
| Person / Time | |
|---|---|
| Site: | Oconee, Palisades, Surry  |
| Issue date: | 01/24/1973 |
| From: | Peltier I US ATOMIC ENERGY COMMISSION (AEC) |
| To: | US ATOMIC ENERGY COMMISSION (AEC) |
| References | |
| TASK-03-05.A, TASK-03-05.B, TASK-3-5.A, TASK-3-5.B, TASK-RR NUDOCS 8001070745 | |
| Download: ML19317E951 (3) | |
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JA.4 ; ; ;373 NOTE TO FILES STEAMLINE BREAK POSITION The attached information was delivered to Duke Power Company for Oconee Unit 1 by telephnne on January 23, 1973.
In response to this information Duke personnel said they would give us a letter right ateay stating Duke's intention to respond within 10 days to items 2 and 3.
They also said they would delay their amendment covering the corrective actions they intend to take in order to fully comply with item 1 within the 90 day time period.
A. Schwencer and I. Peltier (PWR-4) and P. Barton and P. Ansell (Duke) participated in the telephone call.
Original Signed by Irving A. Peltier I. A. Peltier, Project Manager Pressurized Water Reactors Branch No. 4 Directorate of Licensing cc w/ encl:
R. C. DeYoung R. W. Klecker C. Long A. Schwencer D. Fischer DISTRIBUTION 50-269)
Docket [XN NNXNNNXx PWR-4 Reading IAPeltier l
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?****" i Forma AEC-318 gRev.913) ASCM 0240
- u a oovenwruv p=werme cnce. 1972-466-983 o7t'5'
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P' '7. TION ON !!ICII ENERGY LINE RUPTIP" PROBLEM FOR OCONEE, SURRY, AND PALISA. J 9
We have reviewed the information that-you hav/e provided to-date e
with respect to the problems associated with ruptures of high energy lines outside containment. On the basis of our assessment of that information, we have concluded that plant modifications are required to assure that an adequate level of safety is provided over the design lifetime of the facility. Accordingly, you should:
(1) Your analysis of the modifications are required to be submitted within a time period on the order of 90 days for our review and approval.
The information should describe the program to be followed for the design of the required modifications, the procurement of materials and components, and the installation of the modifications. The,chedule for completion should be as short as practical and would be expected to be no longer than about six months from the time we approve the proposed modifications.
(2) Develop a program of inservice inspection for the high energy lines of concern so as to further reduce the probability of rupture during the period of time required to complete the modifications discussed in (1) above. This program should include as a minimum:
(a) Frequent (at least once per shift) visual inspection of all the high energy lines, in the as installed condition, for the detection of leakage or of environmental conditions that might adversely affect the integrity of the lines, and (b)
Frequent (at least once every two months) visual inspection of the metal surfaces of all high energy lines at points of concern (as identified by the
, pipe rupture criteria). The inspection should be directed toward identification of areas of structural distress and leakage.
It is not intended that the plant be shutdown during such inspections.
This program should be implemented immediately upon licensing for operation. The details of the program should be submitted to us as soon as practical, but in no event more than ten days after implementation.
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3g (3)' Prop:ne a program for the prompt implementation of:
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(a) Modifications which will be e aded to mitigate the consequences of the pos.ulated ruptures.
Examples of such modifications are those that will increase vent areas from enclosed spaces, and structural barriers to protect essential equipment, and (b) Those temporary measures that can be taken without undue hardship to significantly improve the capability of the facility to limit the consequences of the postulated ruptures.. Examples of such temporary I
measures are those whereby the probability of power availability to essential (other than Class 1 equipment) equipment is increased, alternate equipment is made available, and special procedures for emergency action in the event of the postulated ruptures.
This program should be submitted to us as soon as practical; the initial sbbnittal should be provided within ten days of this notification and supplements thereto may be l
submitted later if necessary.
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