ML18093A385

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Clarification of TS 6.6
ML18093A385
Person / Time
Site: Aerotest
Issue date: 03/29/2018
From: Slaughter D
Aerotest
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
Download: ML18093A385 (1)


Text

AEROTEST OPERATIONS, INC.

3455 FOSTORIA WAY* SAN RAMON, CA 94583 * (925) 866-1212

  • FAX (925) 866-1716 March 29, 2018 ATTENTION: Document Control Desk U.S. Nuclear Regulatory Commission White Flint North 11555 Rockville Pike Rockville, MD 20852-2738 AEROTEST RADIOGRAPHY AND RESEARCH REACTOR DOCKET NO. 50-228/LICENSE NO. R-98.

SUBJECT:

Clarification of TS 6.6 Ladies and Gentlemen:

The orientation of the detector to the neutron source and loading sequence are crucial to a successful and accurate subcritical multiplication plot (1/M versus U-235 mass) used for the prediction of criticality.

There appears to be confusing legacy language in the ARRR Technical Specifications 6.6 that requires clarification. I request that the existing TS 6.6 be amended so I can use an optimal method for the approach-to-criticality measurement and change the nomenclature "critical experiment" which is confusing based on the common definition of"experiment" to the more common title "approach-to-criticality measurement".

This is the current TS as written: 6.6 "During a critical experiment a subcritical multiplication plots shall be obtained from at least three instrument channels. These channels may be used in addition to the normal operating instrumentation in Table l ."

This is the proposed amended language for TS: 6.6 "During fuel loading of an empty core or a significant number of fuel additions, omissions, exchanges and/or shuffling of an existing core, a subcritical multiplication plot shall be obtained by performing an approach-to-criticality measurement."

Should you have any questions or require additional information regarding this submission, please contact AO President David M. Slaughter, Ph.D. at (801) 631 5919 or dmsraven@gmail.com I declare under penalty of perjury that the statements above are correct and truthful.

. Slaughter, Ph.D.

President and Reactor Admin.

Aerotest Operations, Inc.