ML20059K611

Forwards 931228 Rev to Emergency Plan for Univ of Missouri Research Reactor.Rev Required to Incorporate Changes to 10CFR20, Standards for Protection Against Radiation, That Became Effective 940101

ML20059K611
Person / Time
Site:	University of Missouri-Columbia
Issue date:	01/12/1994
From:	Meyer W MISSOURI, UNIV. OF, COLUMBIA, MO
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM), Office of Nuclear Reactor Regulation
Shared Package
ML20059K616	List: ML20059K611
References
NUDOCS 9402020182
Download: ML20059K611 (2)

Text

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Research Reactor Facility Research Park Columtxa. Mssoun 65211 UNIVERSITY OF MISSOURI-COLUMBIA *f] ((

January 12,1994.

Director of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Attn: Document Control Desk Mail Station P1-137 Washington, DC 20555

Reference:

Docket 50-186 University of Missouri Research Reactor License R-103

Subject:

Written communication specified in 10CFR50.4(bX5) regarding changes to the Emergency Plan without Commission approval as provided for in 10CFR50.54(q)

Enclosed is the December 28,1993, revision to the Emergency Plan for the University of Missouri Research Reactor (MURR). This revision was required to incorporate the changes to 10CFR20," Standards for Protection Against Radiation," that became effective January 1,1994. These changes do not decrease the effectiveness of the Emergency Plan and are being made without prior Commission approval as provided for in 10CFR50.54(q).

The following paragraphs will describe the Emergency Plan changes and the reason for each change to demonstrate that these changes do not decrease the effectiveness of the Emergency Plan.

A minor change was made on page 6 regarding the description of the Facility Emergency Organization. The change clarifies that persons called in to assist, as well as those persons not normally part of the Facility Emergency Organization who are called upon to assist in an emergency, are part of the Fecility Emergency Organization.

The remaining changes were required to incorpo ate the changes to 10CFR20 effective January 1,1994. The definition of MPC was deleted on page 22 of the plan and a new definition entry, Air EfHuent Concentration. was added on page 21 to reflect the changes to Appendix B of10CFR20.

The action levels for the emergency classes listed in Table I, pages 25,26, and 27, had referenced airborne radiological einuent in units of MPC. These action levels were revised to reflect the use of the air effluent concentrations in 10CFR20, Appendix B, Table 2, Column 1.

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Page two  ;

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The new action levels reflect the use of an alternative action level for radiological [

efiluent at the site boundary as defined in ANSI /ANS-15.16-1982, " Emergency Planning )

for Research Reactors"(referenced in hg Guide 2.6 [Rev.1, March 1983] as acceptable  ;

for complying with the emergency plan requirements in 10CFR50.54 and Appendix E of i 10CFR50) and in NUREG-0849, " Standard Review Plan for the Review and Evaluation of  !

Emergency Plans for Research and Test Reactors," October 1983. These guidance  !

documents recommend an action level for radiological effluents at the site boundary ' '

based on " exceeding 10 MPC when averaged over 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, or 15 mrem whole body accumulated in 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />." We had originally used the 10 MPC averaged over 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> as our basis because it had direct reference to Appendix B of 10CFR20 that was applicable at .

that time. With the changes to 10CFR20 and the subsequent deletion of MPC, we are  ;

inc>rporating the alternative action level based on 15 mrem whole body accumulated in 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. Using this alternative basis for radiological efHuents at the distance corresponding to our nearest sitri boundary, we calculated new action levels for airborne radiological effluent concentration at our stack monitor.

P These changes were necessary to implement changes to 10CFR20 effective January 1,  !

1994, and do not decrease the effectiveness of our Emergency Plan. If you have any -

questions, please contact me or J. Charles McKibben at (314) 882-4211.  :

Sincerely, -

f MM Walt A. Meyer, Jr.

Reactor Manager

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ENDORSEMENT:

Reviewed and Approved ,

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