ML19317F288
| ML19317F288 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 02/05/1973 |
| From: | Thies A DUKE POWER CO. |
| To: | Anthony Giambusso US ATOMIC ENERGY COMMISSION (AEC) |
| Shared Package | |
| ML19317F289 | List: |
| References | |
| NUDOCS 8001090631 | |
| Download: ML19317F288 (2) | |
Text
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. o DUKE POWEn COMPANY Powrn 13ust.onto Regulatory Filo Cy.
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Mr. Angclo Giambusso
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gi mv.-f 20545 Washington, D. C.
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y Oconee Nuclear Station
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Re:
Unit 1 Docket No. 50-269
Dear Mr. Giambusso:
26, 1973.
In that letter, you were i
the postulated Please refer to my letter of January informed that as a result of our continuing analys s on iate i
modifications to meet the interpretation of Criter onWe also informed you l
d high general design criteria. interim measures which could reduce the cons nce, or assure energy line ruptures, reduce the probability of occurre is available.
that equipment needed to mitigate the accident t the we met with members of your staff to presenOconee Unit 1 On January 18, 1973, results of our analysis to date and advised them tha h i l accident identified by your criteria did occur.
iteria may not have identified two instances where t.he single failure crConsequ l
nted.
analysis is complete or design modifications can be imp eme been met.
i will take For postulated feedwater line break in the turbine build ng, we the following measures:
locations Drill openings in the piping insulation near high stress i
on January on feedwater piping identified to you in our discuss 1.
detect 18.
any leak.
i time The auxiliary service water pump will be tested for a min mum of one hour each week to assure operability.
2.
3 8001ogo g
-o Mr. Angelo Ciambusso Page 2
. February 5,1973 i
ter will be pulled from the 4160 auxiliary serv ce waThis cable A redundant cable ps.
switchgear to the high pressure injection pumof the high pressure 3.
available for quick manual connection to any injection pumps should it be needed.
the following measures For the feedwater break in the penetration room, h pressure injection will be taken:
The reactor building isolation valve in the higli b bility of a single 1.
failure occurrence.
tidnroomwillbe Insulation on the feedwater lines in the penetrad d once per shift 2.
to detect any leakage.
lled in the penetration An additional temperature detector will be instaoccurrence and locatio h
room to give the operator information as to t e 3.
of a break.
be installed prior to March The above-mentioned temperature detector willIn additi d res are being developed for the following situations: steam 15, 1973.
stem operable and loss break will of feedwater to the steam generators witAlso, the emergency be revised as required to include information resu t n inoperable.
ram to inspect We are also developing procedurcs for a surveillance progProcedu s locations are also being the areas of postulated ruptures.
nations of the metal surfaces of the higher stresMore info within 10 days following initial criticality.
developed.
Very truly yours, A. C. Thies l
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