ML19224B939
| ML19224B939 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 06/18/1979 |
| From: | Wenzinger E NRC OFFICE OF STANDARDS DEVELOPMENT |
| To: | Mattson R Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 7906280045 | |
| Download: ML19224B939 (1) | |
Text
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Dsta ROUTING AND TRANSMITTAL SLIP M 18 S79 TO: Name, omes symbol, room number, Initials Date utiding, Agency / Post)
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L NRC PDR Assessions Unit (P-50) V 2
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Action Fila Note and Retum Approval For Clearance Per Conversation i
As Requested For Correction Prepare Reply Circufate For Your Informat!on See Me bmment Investigate Signature l Coordination Justify REMARK 3 TO BE PLACED IN NRC PDR I&.
DO NoT use this form as a RECORD of approvals, concurrences, disposa!s, clearances, and similar actions l
FROM: (Name, org. symbol, Agency / Post)
Room No - 8!!dg.
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Robert L. Tedesco, L Task Force, Fnone No.
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SG41-lo2 CPTIONAL FORM 41 (Rev. 7-76)
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JUN 18 1979
'T 7' N MEMORANDUM FOR:
R. J. Mattson, Director Division of Systems Safety Office of Nuclear Reactor Regulation FROM:
E. C. Wenzinger, Chief Reactor Systems Standards Branch Division of Engineering Standards Office of Standards Development
SUBJECT:
LESSONS LEARNED FROM THE TMI-2 ACCIDENT In your memo to the NRR Staff dated May 31, 1979 you asked for suggestions and comments concerning constructive changes for regulatory requirements for nuclear power plants.
I would like to submit the following suggestion.
Two problems which I am aware of appear to be amenable to a common solution.
First, TMI-2 has identified a need for knowledge of reactor vessel water level. Another problem which came up in the course of the accident was how to get rid of a gas bubble which developed in the reactor vessel.
The common solution which I suggest be considered is a small vent line (pipe) from the vessel head to some lower pressure point in the primary system or to a higher pressure point with a pump in the vent line. The vent line could allow removal of the gas bubble from the vessel.
Measure-ment of flow in the vent line would provide an indication that the vessel is full.
Please let me know if this idea has m3rit.
//
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l-Q il. '.f.,,N E. C. Wenzinger, Chi f Reactor Systems St'a ards Branch Office of Standards Development 257 135