ML12100A075

Reed College, Proposed Changes to Technical Specifications 3.4

ML12100A075
Person / Time
Site:	Reed College
Issue date:	03/26/2012
From:	Krahenbuhl M Reed College
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
Download: ML12100A075 (2)

Text

M REED COLLEGE REACTOR FACI LITY 3203 Southeast Woodstock Boulevard March 26, 2012 Oregon

Portland, 97202-8199 telephone Document Control Desk 503/777-7222 U.S. Nuclear Regulatory Commission fax Washington, DC 20555-0001 503/777-7274 Docket: 50-288 email License No: R-112 eeactoer@eed.edu RE: Technical specifications web http://reactor.reed.edu Upon further review, we are proposing that Technical Specification 3.4 be changed to clarify the operating modes of the Reed Research Reactor ventilation system. We propose the following:

3.¥ F Ventilation System vplicabi/ib* ThLis speci/cationapplies to the operationofthe reactorbay ventilation system.

Ob/ective. The objective is to ensure that the ventilation system shallbe in operationto mitigate the consequences ofpossible releasesofradioactive materialsresulting/fromreactoroperationor when moving irradiatedfuel Specifications. The reactorshallnot be operatednor irradiatedfuelmoved unless thefaedi/iv ventilation system is operablein one ofthefollo wing modes.

a. Normal mode." The exhaust, supply and control room fans are operating. The reactor bay pressure is maintained negative with respect to the controlroom.

b. Isolation mode." Isolationmode is initiatedby high radiationreadings on the continuous air monitor. The exhaust andcontrolroomfans are operating. The reactor bay pressure is maintained negative with respect to the control room and all exhaust is diverted through a HEPAjilter.

Basis.Duringnormaloperationofthe ventilationsystem, the annualaverage groundconcentrationof dr-41 in unrestrictedareasis well below the applicable effluent concentrationlimit in 10 CFR 20 (SAR/i/.Z 1). 4nalysisofthe k/HA indicatedthat the releaseof effluent to the site boundaryis below the 10 CFR 20 limit (Rtl4Response,Afay 20, 2011). In thepast,the reactorhas been operated Ki q-(L

with the ventilationsystem in isolation mode as necessaryto locate a leal'ngfuel element The HEPA/iltereffectively minimzesparticulateeffluents. SAR 9. I provides a detaileddescriptionofthe ventilation system normalandisolation modes.

I declare under penalty of perjury that the foregoing is true and correct.

Executed on;",1,*,,'t1 Z7 zL/ Z_

Meli da-P. Krahenbuhl, Ph.D.

Director, Reed Research Reactor.