ML20076D463
| ML20076D463 | |
| Person / Time | |
|---|---|
| Site: | University of Wisconsin |
| Issue date: | 06/30/1991 |
| From: | Cashwell R WISCONSIN, UNIV. OF, MADISON, WI |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 9107290176 | |
| Download: ML20076D463 (19) | |
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$ A4 (td@ It.4 4.PDF Tech Specs, Docket 50-156 July 22, 1991 U. S. liuclear Regulatory Commiresion ATTH: Document Control Desk Washington, D. C. 20555 Dear Sirt Enclosed herewith is a copy of the Annual Report for the Iincal year 1990-91 for the University of Wisconsin Nuclear Reactor Laboratory as required by our Technical Specifications.
Very truly yours,
&l R. J. Cashwell Reactor Director Enc. (Annual Report)
XC: Region III Administrator 0107290176 910630 F;DR h ADOCE 0!*000*$6 ppg
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f THE UNIVERSITY OF WISCONSIN NUCLEAR REACTOR LABORATORY l 1
4 1990-1991 ANNUAL OPERATING REPORT PREPARED TO MEET REPORTING REQUIREMENTS OF:
U. S. DEPARTMENT OF ENERGY (REPORT DOE /ER/1560-25)
AND U. S. NUCLEAR REGULATORY COMMISSION (DOCKFT 50-156, LICENSE R-74) l PREPARED BY:
R. J. CASHWELL DEPARTMENT OF NUCLEAR ENGINEERING AND ENGINEERING PHYSICS r- --. , , ..,,,_r... .. ..,,. ,,.-,.-,-,.-s--.--...e.-. .-- ..r,--.- w - , , g..- . -,w,, ,-,--- v - , - - - , ,v.-,-w--w-- w- ,-,r m--,n,,, , . ~ , - - .m--
k THE UNIVERSITY OF WISCONSIN NUCLEAR REACTOR LABORATORY 1990-1991 ANNUAL OPERATING REPORT PREPARED TO MEET REPORTING REQUIREMENTS OF:
U. S. DEPARTMENT OF ENERGY (REPORT DOE /ER/1560-25)
AND U. S. NUCLEAR REGULATORY COMMISSION (DOCKET 50-156, LICENSE R-74) i l
PREPARED BY: ,
, R. J. CASHWELL DEPARTMENT OF NUCLEAR ENGINEERING AND ENGINEERING PHYSICS
VWNR ANNUAL REPORT 1990-91 Pact 1 or 15 1
O <mlew:
Teaching: Teaching usage of the reactor during the year included:
62 NEEP students in laboratory courses 55 students in lecture courses which included demonstrations in the reactor laboratory.
Numerous instructors and students from area school systems were given demonstrations in reactor operations and use.
Students and staff from Colorado College, Colorado School of Mines.
Edgewood College, Madison Area Technical College, Lakeshore Technical Institute, University of Colorado, University of Minnesota.
Duluth, and University of Wisconsin. Eau Claire, used the facilities for formal instruction or research Research: Neutrons from the reactor were used primarily for two activities:
Neuvoo ctivation analysis and neutron radiography.
50 hours5.787037e-4 days <br />0.0139 hours <br />8.267196e-5 weeks <br />1.9025e-5 months <br /> of use were devoted to further development of a neutron radiography experiment capable of real time imaging of operating systems at high framing rates 683 samples were irradiated for research programs in other departments of the UW Madison (Chemistry, Civil and Environmental Engineering, Material Science and Engineering, Ophthalmology, Pharmacy, and Soil Science).
129 samples were irradiated for other educational institution research programs (Colorado College, Colorado School of Mines, University of Colorado, University of Minnesota, and UW Eau Claire).
industrial Use: NAA services were provided to Consolidated Paper Company (measurement of thickness of paper coatings) and RMT, Inc (identification of
, waste material in the environment).
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UWNR ANNUAL REPORT 1990-91 PAGE 2 or 15
.TAllLE OF CONTENTS 4
A. S U M M A R Y O F O P E RATI L, N S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1
- 1. INSTRUCTIONAL USE .UW. Madison Classes and Activities . . . . . . 3 l
- 2. REACTOR Sil ARINO PROGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . 4
- 3. SAMPLE IRRADIATIONS AND NEUTRON ACTIVATION ANALYSIS SEl(VICES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
- 5. CIIANGES IN PERSONNEL, FACILITY AND PROCEDURES . . . . 9
- 6. RESULTS OF SURVEILLANCE TESTS . . . . . . . . . . . . . . . . . . . . . . 9 B. OPERATINO STATISTICS AND FUEL EXPOSURE ......... . 10 C. EMERGENCY SilUTDOWNS AND INADVERTENT SCRAMS ....... 10 D. M A I NTE N A N C E . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
- b. CHANGES IN Tile FACILrrY OR PROCEDURES REPORTABLE U N D E R 10CFR 5 0.5 9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 F. RADIOACTIVE WASTE DISPOSAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
- 11. RESULTS OF ENVIRONMENTAL SURVEYS . . . . . . . . , , . . . . . . . . . . . 12 TABLE 1 LIQUID WASTE TO SANITARY SEWER . . . . . . . . . . . . . . . . . . . 14 TABLE 2 EFFLU ENT FROM STACK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 i -
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UWNR ANNUAL REPORT 1990-91 PAGE 3 0F 15 A. SU5thtAltY OF OPEllATIONS
- 1. INSTitUCTIONAl. USE UW. Madison Classes and Activities Thirty five students enrolled in NEEP 231 participated in a two hour laboratory session introducing students to reactor behavior characteristics. Twelve %
hours of reactor operating time were devoted to this session. %
NEEP 427 was offered in the fall and spring semesters with a total enrollment of 23. Several NEEP 427 experiments use materials that are activated in the reactor. One experiment entitled "Itadiation Survey" requires that students make measurements of radiation levels in and around the reactor laboiatory. All of these reactor uses take place during normal isotope production runs, so no reactor time is specifically devoted to NEEP 427.
The enrollment in NEEP 428 was 32 as it was offered in both semesters.
Three experiments in NEEP 428 require exclusive use of the reactor. Each of these experiments (" Critical Experiment,"" Control Element Calibration," and
" Pulsing") was repeated four times during the year requiring a total of 77 hours8.912037e-4 days <br />0.0214 hours <br />1.273148e-4 weeks <br />2.92985e-5 months <br /> of exclusive reactor use. Other NEEP 428 laboratcry sessions use material that has been irradiated in me reactor (" Fast Neutron Fiux Measurements by Tlueshold Foil Techniques" and "ltesonance Absorption"). These two experiments were repeated six times during the year.
Twenty NEEP 305 students used the reactor for an experiment to measure the half lives of the longer-lived delayed neutron emitters.
Seven students, one of whom was from outside the NEEP department, completed the NEEP 602/699 course entitled Principles and Practice of Nuclear Reactor Operation. This course covers knowledge areas required for a reactor operator at our facility, and includes extensive operation practice. The six NEEP students all indicated they wished to become licensed operators at this facility, and will take the NRC examination in Septembec 1991.
The Reactor Laboratory continues to attract large numbers of tours, with groups from public schools, scout troops, Kollege for Kids, trades apprentice programa, teacher groups, and service organizations visiting for tours and nuclear power information.
UWNR ANNUAL REPORT 1990-91 PAGE 4 0F 15 During Engineering Exposition, a student run open house held in the
, spring of odd numbered years, the laboratory was again made available for public tours. Approximately 12,000 visitors toured the facility.
- 2. REACTOlt SilARING PROGRAM User institutions participated in the program as detailed below.
Participating Principal Number of Faculty / Students Institution Investigator Involved Academic / industrial D. Wookton 1/28 Teacher Internship Program Reactor tour and nuclear power discussion for high school teachers.
Albany liigh School W. Martin 2/45 Reactor tour and nuclear power discussion for high school science students.
Dadger Iligh School Lake Geneva, WI M. l cwendowski 1/37 Reactor tour and nuclear power discussion.
Colorado College E. llenrickson 1/3 NAA of geological sampics for student thesis projects.
Colorado School of Mines F. Cecil 1/2 NAA of Ti/Al alloys in study of emission of charged particles from thin l foils.
l Univ, of Colorado N. Auerbach 1/1 NAA of road materials for study of road dust on soil and vegetation in the Arctic.
Edgewood College Madison, WI P. Weldy 1/7 l NAA demonstration / lecture for Advanced Chemistry Class.
L Elkhorn State College D. Wad 1/9 Reactor 1.aboratory tour and nuclear power discussion
ljWNR ANNUAL REPORT 1990-91 PAGE 5 or 15 Lakeshore Technical ;
. Institute P. Gossen 1/4 i
. Reactor operaticn demonstration showing suberitical, critical, supereritical, l and prompt supercritical modes for students in a health physics technician !
- training program.
hiadison Plan J. Thompson 1/14 Reactor tour and nuclear power discussion as part of an enrichment program for minority students from inner city schools, hindison Area Technical
-College N. Powell 1/16 Reactor operation demonstration as above, for steamfitter apprentice program, hilddleton liigh School J.Jensen 1/25 i Nuclear Power Plant operations presci.:stions. ;
University of hiinnesota Duluth R. Rapp 2/4 Continuation of project using NAA of artifacts to determine provenance. Serpentine samples were analyzed.
Pittsville (WI) liigh School -
S.Schuhz 1/5 Reactor tour and nuclear power discussion.
Reedsville liigh School hi. Brooks 1/72 Presentation on how nuclear power plants operate and comparison of electrical power production methods.
Williamsville (IL) liigh School bl. Stier 1/70 Presentation on radiation sources and concerns, and the U. S, Energy future.
University of Wisconsin Eau Claire Eau Claire, WI N1. Bishop 1/2 NAA of sediment samples in attempt to correlate satellite surveillance data with actual sample content.
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UWNR ANNUAL REPORT 1990-91 PAGE 6 0F 15 m
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. 3, SAMPLE 1RRADIATIONS AND NEUTRON ACrlVATION ANALYSIS i
. SERVICES There were 1,077 individual samples irradiated during the year. Of thesc
. samples,697 were irradiated for 15 minutes or less. Samples accumulated 256.8
. irradiation space hours and.782 sample hours. Many samples were irradiated and then counted at the Reactor I.aboratory as part of our neutron activation analysis service. In the listing below the notation (NAA) indicates that the samples were a processed by our neutron activation analysis service, while RSP listed as source of support indicates work done under the DOE Reactor Sharing Program. ;
Chemisty Department, UW. Madison (NAA) 8 samples,4 sample hours,0.5 Irradiation space hours. Professor Thomas Record, .
one additional staff member, and two graduate students used the NAA service to measure sodium concentrations in DNA solutions in order toil uantify lon/DNA reactions. Supported by Nill and NSF. :
Civil and Environmental Engineering Department, !
UW. Madison.(NAA) .
77 samples,41 less than 15 minutes,82.25 sample hours,12.25 frradia.,on space hours. Professor R. llamm, one add;tional staff member, and 1 graduate student used NAA to measure metal content of garbage in a reclamation project using -
material that would otherwise go into sanitary landfills. Supported by industrial grant.
Colorado College (NAA) 32 samples,64 sample hours,2 irradiation space hour. Professor llenrickson and 6 students used the NAA service for investigation of trace element concentrations in rocks and rock systems. ' Supported by DOE Reactor Sharing Program.
Colorado School of Mines (NAA)'
. 8 samples,4 less than 15 minutes,9 sample hours,3 irradiation space hours.
- Professor F. E. Cecil and 2 students used the NAA service to determine variations l ,
in materials used in an experiment concerning production of energetic charged l particles from thin ducterated 'itanium foils. Supported by EPRI, DOE, and DOE Reactor Sharing Program.
Colorado, University of (NAA) l - 18 samples,9 less than 15 minutes,20.25 sample hours,4.25 irradiation space hours. Staff member N. Auerbach of the Institute of Arctic and Alpine Research, -
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i UWNR ANNUAL RE90RT 1990-91 PAGE 7 0F 15 used the NAA service to determine elemental constituency of road materials at two research sites. Part of a study of the effects of road dust settling on soil and vegetation in the Arctic. Supported by University of Colorado and DOE Reactor Sharing Program.
Consolidated Paper Company (NAA) 13 samples, all less than 15 minutes,3.25 sample hours,3.25 irradiation space hours. The NAA service was used to measure the coating thickness on paper ,
samples, for cross calibration of in plant measurements. Supported by industrial funds.
Edgewood College, Madison, WI (NAA) 1 less than 15 minute sample. 0.25 sample hours,0.25 irradiation space hours.
~ Professor Olson and seven students participated in a laboratory session on neutron activation analysis. Supported by DOE Reactor Sharing Program.
Material Science and Engineering Department, UW Madison (NAA) 109 samples, all less than 15 minutes,27.25 sarnple hours,27.25 Irradiation space hours. Professor John 11. Perepezko, three additional staff members and 5 students are using the NAA service for analysis of Nb Ti Al alloys. The analyses are then used to accurately determine the phase diagram of the alloy system. Supported by DARPA through the Office of Naval Research.
Nuclear Engineering and Engineering Physics, UW. Madison NEEP 427 Laboratory 102 samples,76 less than 15 minutes,85 sample hourt,27.25 irradiation space hours. Irradiat3ns in support of teaching laboratory.
NEEP 413 Laboratory 115 samples,46 less than 15 minutes,142.25 sample hours,77 Irradiation space
- hours. Irradiations in support of teaching laboratory.
NEEP 602/699, Principles and Practice of Reactor Operations 6 ' samples, all less than 15 minutes,1.5 sample hours,1.5 irradiation space hours.
_ Production of samples for instruction and demonstration.
1 l Reactor Laboratory 15 saraples,14 less than-15 minutes,4 sample hours,4 irradiation space hours.
-Irradiations for flux measurements and instrument calibrations.
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UWNR ANNUAL REPORT 1990-91 Pact 8 or 15 Department of Ophthalmology, UT% Madison
. 8 samples, all less than 15 minutes,2 sample hours,2 Irradiation space hours. Dr.
J. Robinson, a research fellow, is using Na 24 to study the movement of the sodium ion into the posterior of the eye in the monkey. Supported tsy National Eye Institute.
Pharmacy Department, U\% Madison (NAA) 157 samples, all less than 15 minutes,33.25 sample hours,31.25 irradiation space hours. Professor P. Bass and 2 students are using the N.A A service to determine sodium and chloride content of aqueous samples, as part of a study of absorption and secretion in the perfused rat intestine. Supported by Nill.
RMT inc. (NAA) 14 samples, all less than 15 minutes,3.5 sample hours,3.5 irradiation space hours.
Measurement of composition of soil and waste material to determine if such analysis could be used to trace the extent of areas containing industrial waste materials. Industrial support.
Department of Soll Science, UW Madison 36 samples,18 sample hours,0.5 irrad;ation space hours. (NAA) Professor E. J.
Tyler and one student. NAA and tracer production to study element behavior in soil water plant systems. Support institutional grant.
60 samples,25 less than 15 minutes,41.25 sample hours,8.25 irradiation space hours. Professor P. llelmke, and 3 graduate students. Production of tracers and analysis of rocks and soils. Supported by Cooperative State Research Service, llatch, and Center for Integrated Agriculture Systems.
University of Minnesota Duluth (NAA) 70 samples,140 sample hours,4 irradiation space hours. Professor Rapp and associates continued their research of establish a data base for determinin};
provenance of serpentine samples. Supported by DOE Reactor Sharing Program.
4 OTilER MAJOR RESEARCll USE The neutron radiography facility was used for 50.44 hours5.092593e-4 days <br />0.0122 hours <br />7.275132e-5 weeks <br />1.6742e-5 months <br /> during the year.
l UWNR ANNUAL REPORT 1990-91 PAGE 9 or 15 5, CilANGES IN PEllSONNEL, FACILITY AND PitOCEDUllES Changes reportable under 10 CI:R 50.59 are indicated in section 11 of this report.
During the year licensed operators Dave Deuno and Michelle Parker left the university for employment elsewhere.
Several improvements made possible by a U. S. Department Of Energy grant have been completed.
A new instrument has been procured and installed to continuously monitor resistivity at the inlet and outlet of the demineralizer.
The vacuum tube high voltage and compensating power supplies for the reactor instrumentation have been replaced with solid state electronics equivalents.
Additional replacements are in progress, with all equipment on hand, awaiting completion of modification checklists and approval of modifications by the Reactor Safety Committee. These include replacement of vacuum tube strip chart recorders, the oscillographic recorder used for pulse readout, and the stack and continuous air radioactivity monitoring system. These will be completed during the 9192 fiscal year, along with purchase of a replacement area radiation monitoring system.
- 6. RESULTS OF SURVEILLAi4CE TESTS The program of inspection and testing of reactor components continues.
Inspection of underwater components showed no deterioration or wear. The purification demineralizer resins are no longer regenerating satisfactorily and will be replaced.
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UWNk ANNUAL REPORT 1990-91 PAGE 10 or 15 11 OPEllATING STATISTICS AND FUEL.. EXPOSUltE Critical Operating Period Startups llrs MW lirs Pulses FY 1990-91 171 674.09 573.30 97 Total Present Core 2292 8435.68 6837.92 534 Total TitlGA Cores 4327 15,619.06 11,907.70 1895 Excess reactivity of core 123.R12 remained constant during the year at 4.30 percent.
C. EMEltGENCY SilUTDOWNS AND INADVEllTENT SCRAMS There were 7 automatic scrams during the year distributed as follows:
7/17/90 Period channel relay and electronic scrams due to noisy period from suspected high voltage power supply breakdown during high humidity conditions.
7/26/90 liigh Voltage Monitor and Period channel scrams when off duty operator brushed against leads of voltmeter attached to monitor power supply fluctuations causing noisy period.
2/2?/91 Picoammeter #2 relay and electronic scram when trainee downranged two ranges when intending to downrange one range.
3/7/91 Picoammeter #2 relay and electronic scram when trainee downranged when he intended to uprange the instrument while increasing power.
3/12/91 Picoammeter #1 relay and electronic scram when trainee downranged when he intended to uprange instrument while increasing power.
3/12/91 Scram from momentary loss of AC power due to ice storm impact on transmission lines.
4/11/91 leg N period trip from high voltage power supply disturbance caused by a pendant switch (used for measurements of rod drop reactivity) hitting the front panel of the power supply distribution box. Both relay and electronic scrams actuated in addition to the scrams indicated above, on 4/30/91 a manual scram was
UNNR ANNUAL REPORT 1990-91 PAGE 11 0F 15 performed due to failure of shim. safety blades to insert on a manual rundown
. signal. The usual method of shutdown at this facility is to perform a manual rundown using the manual rundown switch. This switch causes all control element drives to run down to the "in" limit switch without interrupting current to magnets or removing power from the air solenoid valve for the transient contrcl rod. At the end of this full power run the operator placed the manual rundown switch into the rundown position, lie noted that the regulating blade ran in normally, but that the shim safety blades did not. In addition, the transient rod dropped. The tran. . nt rod drop and regulating blade motion placed the reactor in shutdown condit , but the operetor used manual scram to place the shim-safety blades in sh&n poshion. Subseouent investigation indicated that fuse F4 opened when the switci.
was placed in rundown position. This caused the transient rod to drop, since the solenoid valve that supphes air to hold the rod out was de-energized when ;ae fuse blew. The regulating blade motor circuits are supplied from a separate fase, so it operated normally. Further investigation revealed that the automatic control (serw) channel was responsible for the blown fuse. One of the two solid state relays that control motion of selected control elements during automatic control had shor^ed to ground. The relay and fuse were replaced.
i D. MAINTENANCE Routine preventive maintenance continued to maintain equipment operability, except for the event discussed immediately above.
E. CIIANGES IN TIIE FACILITY OR PROCEDURES REPORTAllLE UNDER l 10CFR 50.59 The porpoise tube, a small hydraulic irradiation facility described in the third paragraph of section 2.4.5, page 2-42, of the SAR had not been used for several years. The hydraulic portions connected to the N" diffuser system were removed, and the incote irraciation device was converted to a radiation basket to be used for small sarr.ples.
A 50.59 analysis of the proposed iept ment of console stnp-chart recorders with a hybrid digital / analog multiple point recorder was performed and submitted to NRC for evaluation as an unrevicsed safety question. Concurrence of NRC with our evaluation was obtained by a letter dated Feb uary 13, 1991. The replacement 3 Las not yet been completed because of the need to schedule reactor down-time for the changeover.
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. l!WNR ANNUAt.: REPORT 1990-91 PAGE 12 or 15 '
- F.E . RADIOACTIVE WASTE DISPOSAL
- 1. SOLID-WASTE ,
No solid waste was shipped froia the facility during the yet.
- 2. - LIQUID WASTE There were two discharges of liquid radioactive waste to the sewer system during the year. Concentrations discharged were below MPC without considering dilution by the sewage discharge flow. Table 1 details the discharges to the sewer system.-
3.- PARTICULATE AND GASEOUS ACTIVITY RELEASED TO THE
~ ATMOSPHERE Table 2 presents information on stack discharges during the year.
G. . SUMMAki' OF RADIATION EXPOSURE OF PERSONNEL (1 MAY 90 - 31 MAY 91)
The period of exposure reported here exceeds one-year because dosimetry data for the previous report was not available from the vendor until long after the end of the report period. No personnel received any significant radiation exposure for.the above period. The highest doses recorded were 60 mrem to the whole body and 100 mrem to extremities.--
H. - -RESULTS OF ENVIRONMENTAL SURVEYS The environmental monitoring program at Wisconsin uses Eberline TLD area monitors located in areas surrou'nding the reactor laboratory. The following table indicates dose rates a person would have received if continuously present in the indicated area for the full year.
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u UWNR ANNUAL REPORT 1990-91 PAGE 13 oF 15 -
-Annual Dose Data -- Environmental Monitors Average. Dose Rate
_ mrem / week
_ Location 1990 Inside Wall of Reactor Laboratory 9.36-Inside Reactor Laboratory Stack 2.40 Highest Dose outside Reactor Laboratory (Reactor Lab roof entrance window: monitor adjacent to stone surface) 3.39 Highest Dose in Occupied Nonrestricted Area (third floor classroom) Room 3141- 1.83 Average Dose in all Nonrestricted Areas (27 Monitor Points): 1.64-
- - Lowest Dose Reported in Non-restricted Area ~ -1.17 L..
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F UWNR ANNUAL REPORT 1990-91 PAGE 14 0F 15 TABLE 1 - LIQUID WASTE TO SANITARY SEWER 3/5/91 5/17/91 Total Total Ci 12.72 234.0 246.72 GALLONS 1400 1100 2500 Co-57 (h1PC Used = 2E 2)
Ci 0 0 0 Ci/mi Fracthm of MPC 0 0 0 Co-58 (MPC Used = 4E-3)
Ci 0.72 1.02 1.74 Ci/ml 9.7E-8 2.4 E-7 1.SE 7 Fraction of h1PC 2.4E5 6.0E-5 4.5E5 Co44) (MPC Used = 1E-3)
Ci 2,61 1.85 4.46 Ci/mi 5.0E 7 4.4E-7 4.7E 7 Fraction of htPC 5.1E-4 4.4 E-4 4.7E 4 Cr 51 (htPC Used = SE 2)
Ci 0 12.65 12.65 Ci/ml 3.0E-6 1.3E-6 Fraction of MPC 0 6.1E-5 2.7E5 Fe 59 (MPC Used = 2E 3) l Ci 3.32 3.32 Ci/mi 6.3E 6 3.5E-7 l
Fraction of htPC 3.2E 3 1.8E 4 Fe 55 (MPC Used = 2E-2)
Ci 179.3 179.3
. Ci/mi 3.4E-4 1.9E.5 Fraction of MPC 1.7E 2 9.5 2 4 Mn 54 (MPC Used = 4E-3)
Ci 1.59 2.51 4.10 Ci/ml 3.0E 7 6.0E 7 4.3E 7 Fraction of MPC 7.6E5 1.5E 4 1. l E-4 Zn-65 (MPC Used = 3E-3)
Ci 7.8 33.38 41.I8
, Ci/mi 1.4E-6 8.0E-6 4.4E-6 Fraction of MFC 4.9E-4 2.7E-3 2,0E-4 Avuage concentration at point of release to sewer = 2.61E-5 Ci/ml.
Fraction of release limit without dilution = 8.2E-4.
Average daily sewage flow for dilution = 2.37E4 gallons.
Largest dal!y release fraction of limit, including dilution = 1.0E-3 of MPC.
. Average yearly concentration = 7.53E 9 Ci/ml.
UWNR ANNUAL REPORT 1990-91 Pact 15 or 15 IAp12. EFFLUENT FROM STACK
- 1. Particulate Activity There was no discharge of particulate radioactivity above background levels.
- 2. Gascous Activity -- Till Argon 41 l
Maximum L ActMty instantaneous Average Discharged Concentration Concentration Month (Curies) Cl/ml x 10< Cl/ml x 10+
July 1990 0.170 2.2 0.0095 August 0.258 2.1 0.0144 September 0.231 3.0 0.0133 October 0.277 3.0 0.0154 November 0.100 2.3 0.0092 December 0.135 2.6 0.0075 January 1991 0,127 0.8 0.0071 February 0 035 0.7 0.0215 March 0.042 0.9 0.0236 April 0.026 0.9 0.0153 May 0.062 1.7 0.0034 Juno 0.054 1.3 0.0031 TOTAL 1 577 3.0 (Maximum) 0.0075 (Average)
Maximum Instantu..cous Concentration = 0.125 of MPC Average Concentration = 3.12SE-4 af MPC MPC used =2.4E 5 Ci/ml; calculated in SAR to yield 3E-8 Cl/mi in non-restricted area b
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