ML17037C385
| ML17037C385 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 09/24/1969 |
| From: | Pratt M Niagara Mohawk Power Corp |
| To: | Morris P US Atomic Energy Commission (AEC) |
| References | |
| Download: ML17037C385 (6) | |
Text
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DATEANSWERED:
COMMENT
,,0 BY:
50 '220 DEscRlp TIQNI(Must Be Unclassified)
Xtr res our 9-? 69 ltr of understandi that all action xecomnended by ACRS haye been carriecf outeeee6 iistfng status of items to be carried outee
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NIAGARA MOHAWK POWER CORPORATION
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MOHAWK 300 ERIK 8OULKVAR13 WEST SYRACUSE, N Y. ISROR September 24, 1969
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Dr.. Peter A. Morris, Director Division of Reactor Licensing United States Atomic Energy Commission Washington, D. C. 20545 g
DOCKETED uSAEC SEP26 1969~
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Re:
Docket No. 50-220
Dear Dr. Morris:
FlICI Cy"C REOOLATORY BPIL SSTIOO DOCKH CEOX I
C'g Your letter of September 2 states that you understand that all actions recommended by the ACRS have been carried out, where necessary, before power operation,,or are being carried out as recommended.
These actions as recommended by the ACRS have been carefully reviewed by our key personnel and we find that your understanding is correct.
For your further specific information at this time the current status of these items is individually set forth below:
Corrosion Surveillance Pro ram 4
Corrosion test specimens have been installed in three different locations on the reactor.
Surveillance requirements for these specimens have been included in Section 4. 2. 2 of the Station's Technical Specifications
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Periodic Ins ection of the Hi h Pressure Coolant S stem A program for periodic inspection of the reactor coolant system during the first five years of operation is described in the Station's Technical Specifications (Table 4. 2.6).
This program was modified shortly after the ACRS review to include plans for in-service inspection of the main steam lines beyond the second isolation valve.
Throughout the first five-year period, inspection experience willbe carefully evaluated and pertinent'industry-wide development efforts such as those presently sponsored by the Edison Electric Institute willbe closely followed to improve means for assuring continued pressure vessel integrity at Nine Mile Point. If review of the present inspection program in the light of the
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continuous evaluation of operating experience over about five years of operation and the development work noted above should result in developing a significantly improved inspection technique, it willbe implemented to the degree practical at Nine Mile Point and the program specifications willbe revised accordingly at that time.
Primar S stem Leak Detection Studies The recommendations of the ACRS have been incorporated in the Station's Technical Specifications (page 48).
A report of progress in this area willbe made to AEC Staff within a year after start of power operation.
Effects of Radiol sis Studies of the potential for radiolytic decomposition of water following a design basis accident have been under way for some time and preliminary results are available for review with-your Staff at any time.
However, completion of our evaluation, including specific recom-mendations for the Nine Mile Point Nuclear Station, await the results of test data being'btained at the ORNL Test Loop and at "the KRB reactor facilityfor the equilibrium value 'of hydrogen at BWR conditions and for the 'rate at which hydrogen would be.evolved following an accident.
Assuming these tests progress satisfactorily in the next few months, we anticipate, submittal of our completed evaluations within a year.
Vibration Monitorin Transducer type instrumentation is presently being studied for possible implementation at Nine Mile Point to detect vibration or the presence of loose parts in the reactor system.
It is anticipated that a hardware package willbe available for installation by the first refueling outage.
Safet Review and Audit Board The current membership of the Safety Review and Audit Board has been increased to include three experts from outside the Niagara Mohawk organization.
Steam Line Radioactivit Monitors Utilization and improvement of these monitors to provide early signs of gross fuel failures will be specifically studied after the Station begins power operation.
Very trul
- ours, lj M. H. Pratt Vice President
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