ML11221A161
| ML11221A161 | |
| Person / Time | |
|---|---|
| Site: | Reed College |
| Issue date: | 08/01/2011 |
| From: | Krahenbuhl M Reed College |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| Download: ML11221A161 (25) | |
Text
REED COLLEGE REACTOR FAC I LITY 3203 Southeast Woodstock Boulevard Portland, Oregon 97202-8199 telephone 503/777-7222 fax 503/777-7274 email reactor@reed.edu web htrp://reactor.reed.edu August 1, 2011 Document Control Desk US Nuclear Regulatory Commission Washington, DC 20555 Docket 50-288 Enclosed is Reed College Reactor's Annual Report.
Please feel free to contact me for additional information.
Director, Reed College Reactor
-L P
REED RESEARCH REACTOR ANNUAL REPORT July 1,2010
-- June 30, 2011
/(
fP~"
I 3/4 ljlI*
)
-'-N...
Reed Research Reactor Annual Report 2010-2011
REED RESEARCH REACTOR ANNUAL REPORT July 1,2010 -- June 30, 2011 3203 Southeast Woodstock Blvd.
Portland, Oregon 97202-8199 503-777-7222 Fax: 503-777-7274 http://reactor.reed.edu reactor@reed.edu Reed ResearchReactor Annual Report 2010-20011
This page is intentionally blank.:...........
U*:
,j:
- .i-.
.,;A: A R
-u2 Reed Research Reactor Annual Report 2010-20] !1
ITABLE OF CONTENTS Overview.....................................................................................................................................
1 People..........................................................................................................................................
3 Reactor Staff.................
3 Reactor Review Com m ittee......................................................................................................
4 Facilities......................................................................................................................................
5 Reactor Facility..................................................................................................................................
5 Rotating Specim en Rack Facility...........................................................................................
5 Pneum atic Transfer System.....................................................................................................
5 In-Core Facilities......................................................................................................................
5 In-Pool Facilities................................................................................................................................
6 Beam Facilities...................................................................................................................................
6 Users..............................................................................................................................................
7 Reactor Operations Sem inar...................................................................................................
7 Outside Users......................................................................................................................................
8 Colleges and Universities............................................................................................................
8 H igh Schools and M iddle Schools..............................................................................................
8 Special G roups.....................................................................................................................................
8 High School Student Project.....................................................................................................
9 Concordia University.....................
j............
b........................
9 Scaler Kits........................................................................................................................................
10 Reed Classes.....................................................................................................................................
10 Industrial and Com m ercial Applications..........................................................................
10 Reactor Operations..............................................................................................................
11 Operations.........................................................................................................................................
11 Unplanned Reactor Shutdow ns...........................................................................................
13 Reactor M aintenance......................................................................................................
14 Significant M aintenance..........................................................................................................
14 10 CFR 50.59 Screenings........................................................................................................
15 Radiation Protection......................................................................................................
16 Personnel Dosim etry....................................................................................................................
16 Fixed Area Dosim etry...............................................................................................................
16 Gaseous Releases............................................................................................................................
17 Liquid W aste Releases............................................................................................................
17 Solid W aste Disposal...............................................................................................................
18 Environm ental Sam pling........................................................................................................
18 Reed Research, Reactor Annual Report 2010-2011
ft.,
~
.7)
<V U.
If Thisipage is intentionally
'J. '
? : "
blank.
S. ',* '¢
'I I.
'I.
-ii C,.,
R a
R Au Ro 2002 Reed Research Reactor Annual Report 2OJO-2O1i*
BOVERVIEW This report covers the period from July 1, 2010 to June 30, 2011, and is intended to fulfill the reporting requirements of the U.S. Nuclear Regulatory Commission License No. R-112, Docket 50-288, the U.S. Department'of Energy, and the Oregon Department of Energy Rule No. 345-030-010.
We specifically wish to thank Portland General Electric and Concordia University for their financial aid.
Reed College operates a 250 kW TRIGA Mark I reactor. The Reed College Research Reactor has been a resource for research and educational projects in the Portland area since 1968. The main uses of the Reed Research Reactor are instruction and research, especially in the field of trace-element analysis.
During the year there were 1,227 visitors from schools, colleges, universities, and special groups. Additionally, there were 531 visitors as part of Reed College activities (prospective students, family of students, Reed classes, etc.).
Forty members of emergency response organizations came for training. This year the reactor was visited by 6 news/publication organizations including Popular Science and US News and World Report. Finally, there were 55 entries by inspectors and regulators from state and federal agencies.
Including tours and research conducted at the facility, the Reed Research Reactor contributed to the educational programs of 7 colleges and universities in addition to 9 pre-college groups. Dufinfg-the year. thereactorwasý taken critical 488 times on 156 days.
The total energy produced was approximately 66 megawatt-hours.
The reactor staff consists of a Director, an Associate Director, a Health Physicist, and Reed College undergraduate students who are licensed by the Nuclear Regulatory Commission as reactor operators or senior reactor operators. The licensed operating staff consists of 22 women and 35 men. During the reporting period, all 14 Reactor Operator candidates passed their NRC exams and 8 of the 10 Senior Reactor Operator candidates passed their NRC exams.
Additionally, Stephen Frantz, the Director for the past 17 years retired. Melinda Krahenbuhl has assumed this role.
There were no radiation exposures to individuals in excess of two percent of the limit during the year. There were no releases of liquid radioactive material from the facility and airborne releases were well within regulatory limits. There were two shipments of low-level radioactive waste from the facility.
The facility did receive and ship fuel this year. The license was amended to increase the special nuclear material inventory to accommodate the receipt and possession of the University of Arizona fuel.
The Nuclear Regulatory Commission conducted inspections during December 6 through December 9, 2010 and June 5 through June 10, 2011. No deficiencies were noted during either inspection.
Reed Research *Reactor Annual Report 2010-2011
-v
. r C
x)! C~
-n
'4 /
4)
I It it
)
I fi~
This page is intentionally blank.
3
. - 13.
"k*
2 Reed Research Retcidr Annual Report 2010-2011'
IPEOPLE Reactor Staff During the period July 1, 2010 to June 30, 2011, the staff consisted of:
Reactor Director:
Associate Director: A Reactor Supervisor:
Training Supervisor:
Assistant Training Supervisor:
Requalification Supervisor:
Radiation Safety Officer:
Health Physicist:
Robin Bjorkquist Matthew Carlson Kathleen Conahan Rosie Cottingham Wesley Erickson Ian Flower Stephen Frantz Evan Green Luke Howard Kaileigh Ahlquist Hannah Allen Praker Bajpai Daniel Dashevsky Gray Davidson Francis Dieterle Todd Garon Gianmarco Greci Kelsy Houston-Edwards Austin Humphrey Stephen Frantz Melinda Krahenbuhl Robin Bjorkquist Reuven Lazarus Celia Oney Matt Carlson Mary Solbrig Kathleen Conahan Kathleen Conahan Mike Vignal Jeremy Silver Ian Flower Kathleen Fisher Rupinder Kaur (4/94 - 6/11)
(6/11 - Present)
(7/09 - 5/11)
(5/11 - present)
(5/10 - 5/11)
(5/11 - Present)
(5/10 - 5/11)
(5/11 - Present)
(5/10 - 5/11)
(5/11 - present)
(5/10 - 5/11)
(5/11 - Present)
(1/03 - Present)
(1/10 - 6/11)
Senior Reactor Operators (SRO)
AMina Kassenbrock Jeremy Silver Ibenjamin Larseii Mary Solbrig Reuven Lazarus Erik Thomas Ellen McManis Mariah Tobin Celia Oney Mike Vignal Neal Reynolds Stephen Von Kugelgen Michael Reichert Patrick Wijngaard Laura Sard Florence Williams Ahmad Shabbar Reactor Operators (RO)
Isaac Khader Marcus Robinson May-Ling Li Brandy Ryan Daniel Lidral-Porter Nick Salter Trevor Lohrey Juliet Shafto Molly Maguire Elisabeth Thomas Huy Nguyen Harry Traulsen Briana Patton Christopher Vittal Evan Pikulski Andrew Warren Neha Rao Erin Weisenhorn Cristi Panda Reed Research Reactor Annual Report 201072011, 3
The list of operators includes everyone, who held a license at any time during the reporting period. Reactor Operators who upgrade their licenses, to Senior Reactor Operators during the reporting period are listed under Senior Reactor Operators. All of the licensed operators are Reed College undergraduate students with the exception of the Director and Associate Director.
For the 2010-2011 year there are..11 women and 19 men with. Reactor, Operator licenses and 11 women and 16 men~withi Senior Reactor Operator, licenses.
Reactor Review Committee '.
The Reed Research Reactor has,two.oversight committees: the Reactor Safety Committee and the Reactor. Operations Committ,.eý.Together they, comprise the Reactor.,Review Committee. The Reactor Safety Committee is concerned with emergency preparedness, health physics, radiation safety, physical security, environmental impact, and the interface between the Reed Research Reactor,'-Ree~i College, and the :surrounding community. The Reactor*,.Ope rations Conmmittee deals.with; the, day-to-day operations. of the reactor, reactor.,maintenance,. reactor.safety,,operator., training, and operator requalification. -The membership ofthe committeesi during -the. reporting period is, shown below:.
Reactor SafetyC Cmmittee' Wayne Lei - Chair (Dire'etor'of Resea~rch and De"elt'
- o
'"e.ie a'.Electric)
Norm Dyer (OAR Services)
'Daniel Gerrity (Chemistrj Faculty, Reed College). '4 Kathfleen' Fisher (Director, Reed Env'irohmentdl Heblthand Safey)'1-"-
Robert McCullough (Cbmmunity Membe-r)
Reactor Operations Committee Juliet Brosing - Chair (Physics Faculty, Pacific University)
Darrell Schroeter. - (Physics Faculty,. Reed College)
Steve Reese (Radiation Center Director, Oregon. State University)
Ron Ross (Portland General Electric).,-..
Steven.Congdon (Community Member),,,
Rulinder Kaudr (Health Physic.ist, RRR)
Ex Officio. yithout vote on both, committees:
Elln Stiuder (Dean of the Faculty, Reed College).'
Stephen Franti (Director, RRR)
Robin Bjorkquist (Associate Director, RRR)
Celia Oney (Reactor'Supervisor, RRR),i Rupinder Kaur (Health Physicist).,
Reed Research Re&ato'i Annual Revbrt 2010-2011 4
FACILITIES F
A C
I L I T I E S
Reactor Facility In addition to the reactor, Reed College has a radiochemistry lab.' The equipment available* at the reactor facility includes high purity germanium gamma spectrometers; alpha spectrometers, a whole body counter, gas flow-proportional cointers, ion chambers, beta counters, Geiger Muller tubes, neutron detectors, alpha detectors, and thermo luminescent dosimeter readers. These instruments are used for experiments and training in nuclear science and radiation detection. Two exit monitors are in-the control room. A liquid scintillation detectot:rserVe* the campus radioisotope committee,. The reactor facility has' several"systems for performing irradiations;ý,ddscribed below.
Rotating Specimen Rack Facti' The rotating specinmen:-'rack( ("lazy sils'an")) ig,, 0j 10ted iifi. :.:,4ellF on top of the graphite reflector surrounding:, the, o-ore.,>The.i 'ack 'cdnsists 'Of"' a*circular array of 40 tubular receptacles, each of-:whiieh,ýck n-avA.3mmodatel tWo'itrrdiatibhn tubes'.: Vials holding up to 17 ml (four drams) are used in this system. Samples are loaded in the specimen rack prior to the start-up of the reactor. The rack automatically rotates during, irradjatin to, ensure each sample receives, the sameý,neutron flux.. Typically,, researchers use.,the rotating rack when long irradiation times (generally greater than five minutes), are required..The approximate thermal neutron flux in, a rotating rack position at full power is 1.7 x10 12 n/cm 2 s with a cadmium ratioof 6i. Thle specimen rack can be used for,ga ma irradiations (approximately 8 Rad/min) when the,reactor is shutdown.
Pneumatic Transfer System The pneumatic transfer system ("rabbit'"),consi-sts' of 'an, iriadiation chamber in the'"outer F-ring of the core and its associatedý pump and piping. This allows' samples' to' be transferred in and out of the reactor core very rapidly while tlhe reactor i s at power.,
Routine use of the pneumatic transfer system involves placing samples into vials, wh ich in turn are placed in special capsules known as "rabbits." The capsule is loaded into the system in the laboratory next to the reactor and i's then trahsferred pnieum*tic'ally -into the core-irradiation position. At the end of a predetermined, time' the sampQe: is: transferred back to the receiving terminal, where it is removed for measurement: The transfer time from the core to the terminal is about seven seconds, making this method of irradiating samples particularly useful for experiments involving, radioisotoppes with short half-lives.
The flux in the core terminal is approximately 5xl012 n/cm 2s,when the reactor is at full power.
In-Core Facilities The central thimble is a water-filled irradiation chamber about 3 cm in diameter. It provides the highest available neutron flux, about lx1013n/cm 2s. Special sample holders are used in the central thimble to provide maximum flexibility in experiment design.
Reed Research Reactor Annual Report 2010-2011 5
A fuel replacement source holder assembly can also be used as an irradiation facility. The chamber fits into a fuel-element position within the core itself. It holds only one specially positioned irradiation container 7.5 cm in length and 2.5 cm in diameter.
Foil-insertion holes, 0.8 cm in diameter, are drilled at various positions through the grid plates. These holes allow inserting special holders containing flux wires into the core, to obtain neutron flux maps of the core..
In-Pool Facilities Near core, in-pool irradiation facilities can be arranged for larger samples. Neutron fluxes will be lower than in the lazy susan and will depend on the-sample location.
An iridium gamma irradiator is also in the reactor pool for gamma only irradiations:.
Beam Facilities, The central thimble canbe evacuated witf gas, producinga v'ertical' neutron beam. This beam can be used to generate directional neiitron'flux, or'fdr limited irradiations above d
the tank. Prompt gamma analysis and neutron radiographyc'an be done. The flux ab6ve the beam exit isapproximately lxl06 n/cM2s when the reactor-isat-full power.
6 Reed Resear1h Reactor Annual Report 2010-2011
USEIRS Reactor Operations Seminar The Reed Research Reactor conducts an.annual seminar,series.. This non-credit course serves as an introduction to nuclear reactor theory, health physics, and reactor operation.
Some of the students continue with in-depth reactor operator training and subsequently apply for a Reactor Operator (RO) license. If successful, the individual may be hired to operate the reactor. In addition, existing ROs may take the NRC Senior Reactor Operator (SRO) exam to upgrade their.licenses...;
During the reporting-period,1 5 0outof 15 RO-chindidateg and'8 out of 10 SRO candidates passed their NRC exams.
Historically students who fail the NRC exam only fail one section and they are allowed to retake that section later. Figure 2 is a graph of the number of license application each year showing how man, new RO and,SRO licenses.were awardted at Reed and how many failed to obtain a license., Folloing thelarge'class in 20Q5 we began limiting the number of license candidates to )15 Rs.per year.
35 30 25 20 15 10 r'4 M
IQ In ID r,
00 M~
0 N~
M
'T r
W M
0 a,
a, a,
O a,
a, a,
0, 0 0
0 0
0 0
0 0
0 a,
a, a,
a, a,
a, a,
a, a
0>
0 0
0 0
0 0
0 3
C~j
-N N-r-
CA V4 N
N r-4 Figure 2 Reed Research Reactor License Exam Results Reed Research Reactor Annual Report 2010-2011 7
Outside Users During the year there were 1,227 visitors from schools, colleges, universities, and special groups. Additionally, there were 531 visitors as part of Reed College activities (prospective students, family of students, Reed classes, etc.).
Forty members of emergency response organizations came for training. This year the reactor was visited by 6 news/publication organizations including Popular Science and US.News and World Report. Finally, there were 55 entries by inspectors and regulators from state and federal agencies.
The following institutions have participated in facility tours, experiments, and research projects in the reporting period.
Colleges and Universities Clark College
-;K........
Columbia Gorge Community-College..
Concordia University Oregon Health Science.lniversity..............
Pacific University Portland Community College Saint Martin's University, High Schools and Middle Schools Buckin'an Elemientary Catlin Gabel a
Corbett High School Elkto'n Charter School' Hosford Middle School
- a
.'Riverdale High S'hool
" Roosevelt High School The International School Woodstock Elementary Special Groups American Chemical Society Atlas Obscura Boy Scouts Cub Scouts nConnect Pop Atomic Reed Latin Day RSO class Saturday Academy Summer ScienceCamp',
.7
- 7-7,.
- 7.
ý I, ý,
8 Reed Research Redctor Annual Report 2010-2011
Figure 3 is a graph showing the history of visiting groups.
40
" t
-i Colleges and Universities
-35
-- &--High Schools an'd Middle Schools"
/
-Special Groups 30 It b,
25
- I I
20 a
a-I t It I
I A
-A 15 10 N.
//.
/!,L**;",
0 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 200& 20.07.]200 2009 2010 2011 Figure 3 Visiting Groups Many reactor tours include hands-on use of facility equipment to conduct experiments in radiation science, health physics, and nuclear physics. A typical lab ivo'6lves determining the background of a Geiger Muller scalar system and then determining the, half-life of a sample of radioactive material. College classes are generally more closely' tailored to the individual interests and needs of the Consortium faculty member involved. Experiments include more direct use of the reactor itself by the students, more detailed analysis of materials, and emphasize the incorporation of other classroom activities as much as possible.
Several special programs for gifted children use the reactor for projects. These are designed to enrich their educational program and prepare them for college. Some of the groups who use the reactor target minority and disadvantaged youth who are-historically under-represented in science professions.
High School Student Project The Reed Research Reactor continues to be used in independent science projects initiated by students from several Oregon and Washington State high schools.
Concordia University The reactor provides training and experiments involving radiation, iadioactive material, and trace element analysis for Concordia University classes.
Reed Research Reactor Annual Report 2010-2011 9
Scaler Kits Through the generosity of Portland General Electric, the reactor lends out kits containing a Geiger counter, a scaler, and some small exempt sources to local high schools.:
Reed Classes I-.
Chemistry 271 students used. neutron activation' analysis to determine chemical composition of an unknown compound.
- Chemistry 101 students determined the half-lives of chemical forms of vanadium.,
Two Reed students used the reactor as part of their senior thesis.
Industrialiand Commercial ;*Apli'iciatio n's...
The Reed' Research Reactor is available for' industrial or commercial concerns when it does not conflict with our educational goals. As in the past, the primary operations involved neutron activation analysis of materials or environmental samples. The facility also provides radiation protection training to interested parties and schools in the area.
4-;
10 Reed Research Reactor Annual Report 2010-2011
IREACTOR OPERATIONS Operations I,
During the year the reactor was taken critical 432 times on 111 days. The total energy produced was approximately 25 megawatt-hours. Operating history by month appears in table 1.: A history of the data is shown in figure.4. Note that the number of times critical for the month of January, this is due to the change from aluminum clad fuel to stainless steel clad fuel received from. University of, Arizona.:
Table 1 Operating History 20010-2011 Times Critical'
- -ý"Days_,tperated-..
MW-hours July 2010
- '8::'..
'r 6
2.18 August 2010 10 3.88 September 21.
.12 1
5.34 October 2010 66 14 2.17 November 2010 42 13 5.78 December 2010 23 8
1.45 January 2011 0
4 0.00 February 2011 57 21 5.71 March 2011 52 21 19.64 April 2011 68 22 13.05 May 2011 60 15 4.30 June 2011 23 10 2.09 Total 488 156 65.59 Reed Research Reactor Annual Report 2010-2011 11
600 500 400 300 200 100 0
Times Critical
-4Days Operated Irradiations
-MW-hrs 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 Figure-4., Operations
).',
.,f o,*
J...*
12 Reed Research Readoj, Annual Report 2010-201],
Unplanned Reactor Shutdowns There were 17 inadvertent reactor shutdowns (scrams) as shown in table 2. There was one unexplained scram. The number of unplanned reactor shutdowns is increasing as shown in figure 5. This trend might be linked to the increased number of operations as seen in figure 4.
Table 2 Unplanned Reactor Shutdowns Date Scram Type Cause Of Scram 8/10/10 Linear Power Operator overshoot target power (auto/manual ranging switch 9/30/10 Linear Power Operator overshoot target power 10/22/10 Linear Power Operator overshoot target power (auto/manual ranging.switch 10/24/10 Linear Power Operator overshoot target -power (auto/manual ranging'switch) 11/7/10 Linear Power Operator overshoot targetpower 11/6/10 Linear Power Operator overshoot target power 12/9/10 Percent power Unexplained.elec:tronic relay tripped 2/10/11-A Percent power Adjusting %power-channelfor power calibration 2/10/11-B Percent power Adjusting % power channel for power calibration 3/22/11 Linear/percent Loss of power to the console' 4/16/11 Linear/percent Operator overshoot target power.
4/9/11 Percent p6wer Opieiat&I: overshfoot iarget'power 4/22/11 Percent power Operator overshoot.targeit power 4/27/11 Percent power Operator overshoot target power 5/10/11 Linear Power Operator overshoot target power 5/12/11 Linear Power Operator overshoot target power 6/28/11 Linear Power Operator overshoot target power 25 20 isi 10 5 -
0 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 Figure 5 Unplanned Shutdowns Reed Research Reactor Annual Report 2010-2011 13
IREACTOR MAINTENANCE Significant Maintenance Reactor staff performs routine equipment checks on a, daily, weekly, bimonthly, semiannual (January and July) and annual (January) basis as required by facility procedures. Reed College maintenance personnel assist ;with' routine preventative maintenance to auxiliary equipment. Significant maintenance operations that were not part of a regular schedule are listed in table 3.
Table 3 Significant Maintenance Operations Date Maintenance"'
8/31/10 Installed manometer to detect reactor bay pressure 9/1/10 Core video monitor installed on the walkthough detector to allow the operator',t6 View.h6ý rcire*2f.
- ý:'i, 9/13/10 Holes drilled in the rim on the reactor tank to all for future installation of up to 8 additional storage racks 10/710 O(*eof 'the bolts holding on'th'e- 'xldiistf"ii bl"c6V&r in the loft'vwas i,
,.;-'4 '*
r;..
Srepblaced.
10/8/10
, New fuel st6rage racks 'were installed on the W6estfeid of the pool, 10/13/1.
. Moved south west pool light 111/1/2010, Cpnsole repairs including fixing safety rod up button, rod-soqurce interlock, rod-rod interlock, tightened ground wire, on the power supply..
11/4/2010 Moved primary and secondar, shutdown switches 11/16/2010 Installed 7 fuel storage racks 11/24/10 Repaired vehtifationdamnpers ',
1/6/11 Gas Stack Monitor (GSM) removed for repaired 1/21/11 Continuous Air monitor ie'plldced-1/25/11 Retrieved allen wrench from the top of the core.
1/31/11 Organized log channel wiring 2/3/11-Solder wire for shim positimon indicator 2/15/11 Solder wire for shim position indicator 3/3/11 Replaced rabbit blower motor 3/17/11
'GSM reinstalled after repairs 5/2/11 Removed PA system 5/2/11 Replaced ceiling tiles in the control room 6/4/11 Replaced pool thermocouple.
14 Reed Research Reactor Annual Report 2010-2011
10 CFR 50.59 Screenings Three 10 CFR 50.59 screenings were reviewed during this reporting period. None of these screenings were referred to the reactor operations committee. Two of the three screenings were a direct result of the replacement of the aluminum-clad fuel in the 'core.
A brief description of the screening is included.:
10-2 Install additional fuel storage racks:
i fu storage racks v ere pl aced. in the reacto:r' pool to accommodate the stainless steel fuel. The storage racks were designed to hold 10 elements with a keff less than 0.80 (F. C. Foushee letter dated 3/1/1966.)
10-3 Replace Rabbit Blower Motor, Motor was replaced by physical'plant.
11-01 Replacement of the remaining aluminum-clad fuel in thereactor with stainless steel iclad fuel.
- :,. ":L The remaining aluminumcclad-fuel was-,replaced 'with stainless steel clad fuel as a Special Experiment. Thefu perthe M
number of fuel elements necessary for-criticality was -estimated from the known amount of fuel in core 46 and-the known-amount of fuel in the stainless steel cad fuel. U-235.in.the 'fuel was estimated based-on burn-up.calculations. Core--excess, shutdown margin, thermal power calibration dh4d66fitrol iod"Woldh pr6cedures "66mied. A '6bmphais6on of the AI/SS mixed c0'e parameters and ihe 6ll staiAle'ss steel cre 'parameter~s' a~re listed in table 4.-, Parameters are within technical specifications. Specifically, the core excess is less than $3.00.and the shutdowni margin' is great~eitfirn"$O.5ý.
.". Table 4 Comparison of the SS/A, andSS only core parameters Parameter SS/ALi-SS, Core excess.
$150
$1.61 Shutdown margin
$5.96,$5.55, Control'rd*dwo*rthi
Safety
$3.110.
$2.74, Shim
$3.05,,
$3.12 Regulating
$1.311
$1.30 Total
$7.46
$7.16 Reed Research Reactor Annual Report 2010-2011 15
IRADIATION PROTECTION Personnel Dosimetry During the period July 1, 2010 to June 30, 2011 personnel dosimeters were, issued to 54, Reed students and staff. Since dosimeters are, changed on a calendar quarter schedule, this period is the closest to the reporting period. Individuals were issued beta-gamma sensitive ring badges and whole-body badges. TheDirector and Associate Director were issued beta-gamma-neutron sensitive dosimetry.
During the year the largest annual whole body dose was 21 mrem deep dose equivalent.
The largest annual extremity dose was 640 mrem shallow dose equivalent. These doses are atypical of the facility and were the result of an experiment using the central thimble.
Fixed Area Dosimetry Radiation levels are continually monitored to provide an indication of the average radiation levels in the reactor bay and dose outside the facility. All dosimeters monitor beta and gamma radiation. Three locations also measure neutron dose.
The deep dose equivalent radiation measured by fixed dosimeters during the period July 1,2010 to June 130, 2011 are shown in table 5. M indicated less than 1 mrem during the quarter.
Table 5 Area Radiation Dosimeters (doses are in mrem per calendar quarter)
Location Height Radiation Jul 1 -
Oct 1-Jan I-.
Ap)p Location_
(M)
Detected Sep30 Dec 31 Mar 31 Jun 30 Reactor North Wall 1.6 13,'
24 30 31F 67 152 Reactor North Wall 2.3 13, 25 13 28 59 1,..
- 25: "
Reactor East Wall.
1.5 13,yn 15 7
72 640 734 Reactor West Wall 1.0 13,,, n 21 20 46 45, 132 Reactor South Wall 1.6 13, 48 52 46 38 184 Control Room 1.5 13, 34 32 11 8
85 Outside North 2.8 13, 17 22 12 37 88 Outside Roof 0.4 13,,, n 3
6 107 16 132 Outside East 1.5 13, M
M M
M M
Outside South 0.4 13, ?
M M
M M
M Counting Room 1.5 13,y M
M M
M M
Imaging results were inconclusive, second reading agreed photon energy less than 40 keV 16 Reed Research Reactor Annual Report 2010-2011
Gaseous. Releases The only routine release of gaseous radioactivity is from '"Ar (!.83-hour half4ife) and 16N (7.13-second half-life), These come from activation of pool water and air in the pool water 'arid in the ifradition facilities. For the rep6rting' period,' the average gaseous activity at the site 'bounidary was 2.62 x 107.' pCi/ml, which 'would deliver a dose t6 a memb'er of 'the public of approximiately 1:31, mrem, well below regulatory guidelines and congtraints.
Figure' - 6 shows
' the gaseous releases for each year.
1.E-06 1.E-07 1.E-08 1.E-09 1.E-11 a'
a a J
1.E-12 1992 1993 1994 1995 1996 1997 1998 1999 20ýb0 2001" 20022003' 2004 2005 2006 2007 2008 2009 2010 2011 Figure 6"GaseousaReheases Activity (1 V.Ci/ml) at Site Boundary
- a...
Liquid Waste Releases No liquid radioactive waste was released.from the, Reed Research Reactor during this report period.
a Reed Research Reactor Annual Report 2010-2011 17
Solid Waste Disposal There were two shipments of low-level radioactive waste from the facility during this reporting period. The shipments are summarized in table 6.
Table 6 Summary of Solid Waste Shipments Date Drum Activity Radionuclides 4/7/11 0
6.27076 MBq (0.1695 mCi)
Co60, Mn54, Sb124, Zn65 4/7/11 P
0.25578 MBq (0.0069 mCi)
Co60, Cr51, Cs134, Eu152, Eu154, Fe59, Mn54, Sb124, Sb125, Sc46, Se175, Sn 113,
_ _Ta 182, Zn 65 7/27/10 16.17307 MBq (0.4371mCi)
Environmental Sampling Soil samples taken from the area surrounding the facility showed no activity above background. Water from the facility's secondary cooling system and the nearby canyon were sampled for activation products and tritium, but showed no activity above normal background.
18 Reed Research Reactor Annual Report 2010-2011