ML19345A432
| ML19345A432 | |
| Person / Time | |
|---|---|
| Site: | Yankee Rowe |
| Issue date: | 10/30/1964 |
| From: | Boyd R US ATOMIC ENERGY COMMISSION (AEC) |
| To: | |
| Shared Package | |
| ML19345A431 | List: |
| References | |
| NUDOCS 8011210401 | |
| Download: ML19345A432 (2) | |
Text
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UNITED STATES ATOMIC ENERGY COMMISSION HAZARDS ANALYSIS BY THE RESEARCH AND POWER REACTOR SAFETY BRANCH DIVISION OF REACTOR LICENSING IN THE MATTER OF YANKEE ATOMIC ELECTRIC COMPAhT PROPOSED CHANGE NO. 60 DOCKET NO. 50-29 Introduction b-Pursuant t e provisions o'. Section 50.59 of the Commission's regulations, in Yankee Atom ~
diectric Con.puy in Proposed Change No. 60, dated October 16,
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1964, requested authorizati<u of a change in the Technical Specifications
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attached as Appendix A to License No. DPR-3.
This proposed change would g
1 authorize Yankee to perforu a test to determine the ef!fect of operation at a
power with both boric acid and ammonium hydroxide present in the reactor primary coolant system water at the same time.
Discussion Under the conditions of the proposed test, the Yankee reactor would be operated with a maxieum of 10 ppm of ammonia and 600 pps of boron present in the primary coolant system water at any time during the test. The reactor has previously been successfully operated with boric acid and ammonium hydroxide in the primary coolant system, but not at the same time. Yankee has stated that it would like to perform the proposed test using beron to control reactiv-ity simultaneously with the use of ammonia to control pH in order to develop information relative to the acceptability of'the simultaneous use of the two during reactor operation. They have reported that they believe this test to be of significance in developing and defining the optimum water chemistry for 2
pressurized water reactors, j
We have reviewed the proposed test and believe that with close surveillance.
of the main coolant system chemistry conditions and other effects, as proposed by Yankee, it should be possible to detect any adverse result which might occur during the test, such as plate-out of boron or excessive evolution on ncn-condensible gases, before it could present a. safety problem.
If any l
adverse effect were to manifest itself which might jeopardize safety, the.
reactor could be shut down or the test discontinued. Accordingly, we have
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cencluded that the proposed test can be safely conducted in the manner described l
by Yankee.
i In view of the above, it is our opinion that performance of the test may.be authorized, and the Technical Specifications should be changed by addition
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f the following:
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"Notwithstanding the provisions of the Technical Specifications
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(Section 106 of the hazards surnary report)," -nkee Atomic Electric Company is authorized to perform a test, as ses ribed in Proposed Change No. 60, dated October 16, 1964, witt up to 10 ppm of ammonia and not more than 600 ppm of bcron present in the primary coolant g
system water. This provision of the Technical Specifications shall F
be effective until completion of the test described in Proposed Change No. 60 or sixty days from the date of this letter, whichever 3..
occurs first."
Conclusion
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Based on the above, we have concluded that the Proposed Change does not present significant hazards considerations not described or implicit in the hazards summary report, and that there is reasonable assurance that the health and safety of the public will not be endangered.
..1 EUs Original signed by:
3; Roger S.Boyd Roger S. Boyd, Chief -
Research and Power Reactor Safety Branch
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Division of Reactor Licensing
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Date:
OCT 3 01CM
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