ML18024A808
| ML18024A808 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 04/19/1979 |
| From: | Stello V Office of Nuclear Reactor Regulation |
| To: | Murley T NRC OFFICE OF NUCLEAR REGULATORY RESEARCH (RES) |
| References | |
| NUDOCS 7905290552 | |
| Download: ML18024A808 (6) | |
Text
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ng'RC PDR HENORANDUtt FOR:
T. E. f/ur'ley, Director. Division of Reactor Safety
- Research, NRR FROM:
SUBJECT:
V. Stello. Jr., Director, Division of Operating
- Reactors, NRR SANDIA CONNECTOR TEST PLAN (BROMNS FERRY, UNIT 3)
He have reviewed the second draft of the subject test plan, dated February 16, 1979,'repared by Sandia Laboratories.
Based on our review. we consider that the enclosed comments need to be resolved in order that the proposed test plan meet the objective of the test program (that of duplication of the previous test performed by Nyle Laboratories for demonstrating the qualification of electrical connector assemblies of Browns Ferry, Unit 3).
At the February 22, 1979, second NRR/RES/If/Sandia management meeting on Research into Fire.Protection and gualification Testing Evaluation, it was stated that Sandia and IE will meet with TVA and Hyle personnel to discuss some possible problem areas of interpretation in interpreting how Wyle Laboratories ran the original test.
The outcome of the meeting may also affect the test plan.
Since ther e are several areas in the test plan that, appear to need revisions in order that a duplicate test can bd run, we propose a
meeting of the conce~~3'personeel (NRR/RES/IE/Sandia) to address the final test plan, Further, the Technical Considerations stated in the memorandum dated February 8, 1979, from R. Tedesco and R. Vollmer to L. Tong, Assistant Director for Hater Reactor Safety Research,
- RSR, should also be considered in assuring that a duplicate test will be performed.
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.cc w/encl osure:
'R. Hattson V. Stello D. Eisenhut R. Vollmer H. Thornberg R.
Tedesco
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Hanauer R. Satterfield W. Butler W. Rutherford G. Bennett G. Lainas R. Feit D. Tondi t1, Chiramal E. Butcher
COMMENTS TO SANDIA CONNECTOR TEST PLAN BROHNS FERRY UNIT 3) 2.
The orientation of the test specimens in the test chambers is not specified in the test plan.
It is noted that the metal box in which the connector assemblies will be mounted is fore-shortened to a length of 18 inches as compared to. 20 inches in the Hyle test.
The mounting details of the assemblies in the box are not given in the test plan.
The mounting of the assemblies in the metal box and the orientation of the box in the test chamber should duplicate the arrangements of the original Hyle test.
The location of the temperature and pressure sensors to be used in controlling and monitoring the test chamber, parameters should be specified in the test plan.
The relative positions of the sensors, with respect to the test specimens, must conform to corresponding locations in the Hyle test.
3.
The details of the power supply and its connections to the test specimens should be.included in the proposed test plan.
For the iiradiation test the Co-60 hot-.cell facility used in the Hyle tests and the Co-60 simulator at Sandia must be compared.
The test procedure should specify the dosime'ters,to be used in measuring the exposure rate and the integrated do.e.
The differences between th two tests should be identified and resolved.
5.
The accuracies specified for aging temperatures at +6oF as compared to +2 F.
- The method of nitrogen ag'ing proposed in the test plan differs from the used in the original test.
All such discrepancies must be corrected.
6.
The baseline functional zests in the proposed test plan are proposed to be performed prior to the irradiation test,
- however, in the original test this was done just before the accident simulation test.
The test plan should be modified to reflect this requirement.
(Please note that the "Test Procedure for Brov.ns Ferry B=ndix Connectors, Revision - Undated" attached to the proposed test plan is not the test procedure used by Hyle in conducting the original test.
It is the test procedure used at a later test - the 10 year aging test.)
The proposed test plan setup requires the use of butt splices inside the test chamber to make electrical connections to cables.
This should be deleted and the conductors should be routed through the test chamber
- without any splices or terminations.
The plan proposed to use saturated steam to, approximate the temperature/
pressure conditions of the test profile.
The Hyle test had used superheated steam to achieve the profile.
The Wyle test apparatus had means of automatically controlling toe chamber temperature and pressure to meet the test profile.
Sandia Laboratories propose using manual control to regulate steam tempera-ture and pressure.
The test apparatus must be modified so tha: it can duplicat e the environmental test profile of the original tes-.
(Me recommend that an adequate number of pre-test runs be perfor;,ied to assure that the test apparatus can duplicate the proposed test profile.}
9.
The post accident test temperature soaking at 120oF for 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> has not been included in the Sandia test plan.
10.
The test chamber should be purged with nitrogen prior to the accident simulation test.
11.
It is to be noted that the post accident dimensional
- tests, duroneter
- test, connector measurements and post-test inspection are to be conducted for completeness of the qualification test and are not part of the acceptance criteria for the test.
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