ML19345A408
| ML19345A408 | |
| Person / Time | |
|---|---|
| Site: | Yankee Rowe |
| Issue date: | 09/07/1966 |
| From: | Boyd R US ATOMIC ENERGY COMMISSION (AEC) |
| To: | |
| Shared Package | |
| ML19345A407 | List: |
| References | |
| NUDOCS 8011210319 | |
| Download: ML19345A408 (6) | |
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SAFETY EVALUATION BY THE RESEARCH AND POWER REACTOR SAFETY BRANCH DIVISION OF REACTOR LICENSING IN THE MATTER OF YANKEE ATOMIC ELECTRIC CGIPANY PROPOSED CHANGE NO. 72 DOCKET No. 50-29 Introduction Pursuant to the provisions of Section 50.59 of the Conssission'a regulations, Yankee Atomic Electric Company in Proposed Change No. 72, d,ated August 1,1966, requested authorization of a change to the Technical Specifications attached as Appendix A to License No. DPR-2.
This proposed change would authorize re-routing of the existing pressurizer capillary vent and permit installation of a second capillary vent near the pressurizer water-gss interface.
This change was reques ted to simplify the pressurizer gas sampling operation and to obtain more representa-tive samples of the pressurizer gas phase constituents.
Discussion i
l A capillary vent system is provided on the pressurizer to permit venting of non-condensible gasses from the pressurizer gas phase.
This vent is located near the top of the pressurizer and is also used as a sampling line to determine the composition of the gasses within the pressurizer. Yankee believes that some stratification of these gasses has occurred, and has proposed to install a second vent near the water-gas interface so that gasses at that location can also be sampled. The new vent will be installed at an existing pressurizer penetration and should have no effect on operation of the pres'surizer or the associated instrumentation.
The capillary vent is currently routed to a sample cooler within the containment and thence to the low pressure surge tank. This arrangement requires containment entry by operating personnel to obtain a pressurizer vent sample. To simplify this procedure Yankee has proposed to re-route the capillary vents through an existing high pressure vent line to the sample sink in the primary auxiliary building and finally to the low pressure surge tank.
This nadification will permit more frequent sampling and reduce the exposure to operating personnel.
Since l
these modifications will not affect operation of the pressurizer or containment integrity, we believe that the safety of reactor operations will not be adversely affected by this change.
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Conclusion We have concluded that the proposed change does not present significant hazards and that considerations not described or implicit in the hazards sununary report, there is reasonable assurance that the health and safety of the public will not be endaagered.
Oripat sir.ee ty:
R:ger S. 80)d Roger S. Boyd, Chief Research & Power Reactor Safety Branch Division of Reactor Licensing SEF 7 til 1
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