ML090690305

From kanterella
Jump to navigation Jump to search
Dairyland Power Cooperative La Crosse Boiling Water Reactor - 2008 Annual Radioactive Effluent Report and Radiological Environmental Monitoring Report
ML090690305
Person / Time
Site: La Crosse File:Dairyland Power Cooperative icon.png
Issue date: 02/23/2009
From: Berg W
Dairyland Power Cooperative
To:
Document Control Desk, NRC/FSME
References
LAC-14058
Download: ML090690305 (22)
v • d • e


Text

LA CROSSE BOILING WATER REACTOR (LACBWR)

DAIRYLAND POWER C OO P E R A T IV E February 23, 2009 In reply, please refer to LAC-14058 DOCKET NO. 50-409 Document Control Desk U. S. Nuclear Regulatory Commission Washington, DC 20555

SUBJECT:

Dairyland Power Cooperative La Crosse Boiling Water Reactor Possession-Only License No. DPR-45 Annual Radioactive Effluent Report and Radiological Environmental Monitoring Report

REFERENCES:

(1) NRC Letter, Keppler to Linder, dated August 12, 1983,.

Inspection Report 50-409/83-10 (DRMSP)

(2) LACBWR Technical Specifications 6.4.2, 6.5.1. .c & d In accordance with 10 CFR 50.36a(a)(2), this letter serves to transmit to you the Radioactive Effluent Report and Radiological Environmental Monitoring Report for the La Crosse Boiling Water Reactor (LACBWR) for 2008.

If you have any questions, please contact us.

Sincerely, DAIRYLAND POWER COOPERATIVE William L. Berg, President & CEO WLB: LLN: two Enclosures cc/encl: Peter Lee, Ph.D., NRC Reg. III, Decommissioning Branch Kristina Banovac, NRC Project Manager Don Hendrikse, Wisc. Div. of Health ACOUi A Touchstone Energy Cooperative _t 1~SM~L S4601 State Highway 35

  • Genoa, WI 54632-8846 - 608-689-2331 - 608-689-4200 fax ° www.dairynet.com

RADIOACTIVE EFFLUENT REPORT AND RADIOLOGICAL ENVIRONMENTAL MONITORING REPORT FOR THE LA CROSSE BOILING WATER REACTOR (LACBWR)

(January 1 to December 31, 2008)

DAIRYLAND POWER COOPERATIVE 3200 EAST AVENUE SOUTH LA CROSSE WI 54602-0817

TABLE OF CONTENTS SECTION A: RADIOACTIVE EFFLUENT REPORT Section Title Page In tro d u ctio n ................................................................................ . ... .. 1 1.0 R eg ulatory Lim its ........................................................................ .... .. 2 2.0 Effluent Release Concentration Limit ............................................... 4 3.0 Average E ne rgy .......................................................................... .... .. 4 4 .0 A nalytical Methods ......................................................................... .. 4 5.0 Batch R e leases ................................................................................ 5 6.0 A bnorm al R eleases ........................................................................ 6 7.0 Estimated Total Analytical Error ..................................................... 6 8.0 Offsite Dose Calculation Summary and Conclusions ...................... 12 9.0 Offsite Dose Calculation Manual (ODCM) Review .......................... 13 10.0 Process Control Program (PCP) Review ........................................ 13 SECTION B: RADIOLOGICAL ENVIRONMENTAL MONITORING REPORT Section -Title Page In tro d u ctio n ................................................................................ . ... .. 1 1.0 S a m ple C o llectio n ..................................................................... ..... 2 2.0 Results of the 2008 Radio-Environmental Monitoring Survey .......... 2 3.0 Conclusions .......................................... 4 4.0 Interlaboratory Comparison Program Results ................................ 5

TABLE OF CONTENTS TABLES SECTION A: RADIOACTIVE EFFLUENT REPORT Table No. Title Page 1A Effluent and Waste Disposal - Gaseous Effluents Sum m ation of A ll Releases .............................................................. 7 1B Effluent and Waste Disposal - Gaseous Effluents E levated R e le ase ............................................................................ . 8 2A Effluent and Waste Disposal - Liquid Effluents Sum m ation of A ll Releases .............................................................. 9 2B Effluent and Waste Disposal - Liquid Effluents ............................... 10 3 Effluent and Waste Disposal Annual Report - 2008 Solid Waste and Irradiated Fuel Shipm ents ........................................................ 11 SECTION B: RADIOLOGICAL ENVIRONMENTAL MONITORING REPORT Table No. Title Page 5 Sample Frequency and Analysis of Radio Environmental Samples. 10 6 Permanent Environmental Monitoring Station Locations ................. 11 7 Environm ental TLD Locations ......................................................... 12 8 Radio-Environmental Samples Collected January-December 2008. 13 9 Quarterly Thermoluminescent Dosimeter Dose Measurements in the LA C BW R V icinity ................................................................... 14 10 Weekly Gross Beta Air Particulates in the LACBWR Vicinity ........... 15 11 Air Particulate Com posite Results ................................................... 19 12 Results of Analysis of Mississippi River Water in the Vicinity of LA C BW R ...................................................................................... 25 13 Results of Analysis of Mississippi River Sediment in the Vicinity of LA C B W R ...................................................................................... 31 14 Fish Sample Activity in the Vicinity of LACBWR .............................. 32 ii

TABLE OF CONTENTS FIGURES No. Title Pagle FIGURE 1 LA C BW R Property Map ........................................................... 6 FIGURE 2 Permanent Environmental Monitoring Station Location ............ 7 FIGURE 3 LACBWR Environmental Dose Assessment Locations ............ 8 FIGURE 4 LACBWR Environmental Dose Assessment Locations ............ 9 iii

SECTION A RADIOACTIVE EFFLUENT REPORT

INTRODUCTION:

The La Crosse Boiling Water Reactor (LACBWR), also known as Genoa Station No. 2, is located on the east bank of the Mississippi River near Genoa, Vernon County, Wisconsin. The plant was designed and constructedby the Allis-Chalmers Manufacturing Company. It was completed in 1967 and had a generationcapacity of 50 MW (165 MW(th)). The reactoris owned by DairylandPower Cooperative (DPC).

The reactorwent criticalin July 1967 and first contributedelectricity to DPC's system in April 1968. After completing full power tests in August 1969, the plant operatedbetween 60% and 100% full power, with the exception of plant shutdowns for maintenance and repair.

In April of 1987 plant operation was ceased. The reactoris presently defueled and in a SAFSTOR mode. In August of 1987 a possession-onlylicense was received.

In accordancewith LACBWR Technical Specifications 6.5.1. 1.d and in compliance with 10 CFR 50.36a(a)(2), this document is the Radioactive Effluent Report for the period January 1 through December 31, 2008.

1

EFFLUENT AND WASTE DISPOSAL REPORT (Supplemental Information)

FACILITY: La Crosse Boiling Water Reactor LICENSEE: Dairyland Power Cooperative DOCKET NO. 50-409 1.0 REGULATORY LIMITS

a. Gaseous Effluent Release Limits:

LACBWR's stack effluent release limitations for gaseous effluent releases of radioactive material limits the release rate of the sum of the individual radionuclides, so that the dose rates to members of the public beyond the Effluent Release Boundary do not exceed 500 mRem/year to the whole body, 3000 mRem/year to the skin from noble gases, and 1500 mRem/year to a critical organ from H-3 and particulates with half-lives greater than 8 days as per the requirements of the Offsite Dose Calculation Manual (ODCM).

Also, in accordance with 10 CFR 50, Appendix I, the ODCM limitations for gaseous effluent radioactive material limit the air dose to a member of the public from noble gases in areas beyond the Effluent Release Boundary to less than 5 mRad gamma and 10 mRad beta per calendar quarter, and less than 10 mRad gamma and 20 mRad beta per calendar year. The dose limits from H-3 and particulates with half-lives greater than 8 days are less than 7.5 mRem per calendar quarter, and less than 15 mRem per calendar year to any organ.

Cumulative dose contributions from gaseous effluent releases are determined in accordance with the LACBWR Offsite Dose Calculations Manual.

2

EFFLUENT AND WASTE DISPOSAL REPORT - (cont'd)

b. Liquid Effluent Release Limits:

LACBWR's liquid effluent release limitations for liquid effluent releases are those concentrations specified in 10 CFR 20 Appendix B, Table 2, Column 2.

For alpha emitting radionuclides, the concentration is limited to a total activity concentration of 4.9E-9 pCi/ml, based upon an actual alpha emitting radionuclide analysis performed on a representative water sample. The values reported in tables 2A and 2B, Liquid Effluents, are based on dilution with the combination of LACBWR and Genoa Station No. 3 condenser cooling water flow prior to discharge to the Mississippi River. No credit is taken for further dilution in the mixing zone of the Mississippi River.

Also, in accordance with 10 CFR 50, Appendix I, the dose commitment to a member of the public from radioactive materials released in liquid effluents to areas beyond the Effluent Release Boundary are limited to less than 1.5 mRem whole body and 5.0 mRem organ dose per calendar quarter, and less than 3.0 mRem whole body and 10 mRem organ dose per calendar year via the critical ingestion pathway.

Cumulative quarterly and annual dose contributions from liquid effluent releases are determined for the adult fish ingestion pathway in accordance with the LACBWR Offsite Dose Calculation Manual.

c. Solid Radioactive Waste All solid radioactive wastes are handled in accordance with a Process Control Program as defined by LACBWR procedures in order to assure that all applicable transportation and burial site disposal requirements are met.

3

EFFLUENT AND WASTE DISPOSAL REPORT - (cont'd) 2.0 EFFLUENT RELEASE CONCENTRATION LIMIT The Effluent Release Concentration used to calculate permissible release rates are obtained from 10 CFR 20, Appendix B, Table 2, Column 2.

3.0 AVERAGE ENERGY The release rate limits for LACBWR are not based on average energy.

4.0 ANALYTICAL METHODS

a. Liquid Effluents Liquid effluent measurements for gross radioactivity are performed by HPGe gamma isotopic analysis of a representative sample from each tank discharged. In addition, each batch discharged tank is analyzed for alpha and tritium activity concentration. A composite sample is created by collecting representative aliquots from each tank batch discharged during a calendar quarter. This composite is analyzed for Iron-55 and Strontium-90 by a contractor on a quarterly basis.
b. Airborne Particulates Airborne particulate releases are determined by HPGe gamma isotopic analysis. This analysis is performed by analyzing a glass fiber filter paper taken from the stack monitor which continuously isokinetically samples and monitors the stack effluent. This filter is changed and analyzed on an approximate weekly basis and analyzed within 7 days after removal. This filter is also analyzed for alpha activity. A quarterly composite of these filters is sent to a contractor for Sr-90 analysis.

4

EFFLUENT AND WASTE DISPOSAL REPORT - (cont'd)

c. Radioiodines Since the plant shutdown in April 1987, the 1-131/1-133 have decayed completely to stable elements. Amendment 66 to the LACBWR Technical Specifications, deleted the requirement for monitoring for iodine.
d. Fission and Activation Gases The concentration of radioactivity (pCi/cc) in gaseous releases from the stack is continuously monitored by two in line stack monitors. These gas concentrations (pCi/cc) are corrected for pressure loss in the sampling system and averaged by the monitors microprocessor. The results are used along with the stack flow rate to obtain the daily gaseous release from the plant. Since the plant shutdown in April 1987, gaseous releases have been immeasurable. All fission gases except Kr-85 have decayed to stable elements.
e. Tritium Tritium releases are determined by taking a grab sample of the stack atmosphere at the effluent of the stack monitor. Tritium, as tritiated water, is removed from the sample stream by condensation, using a cold trap. The condensed water vapor is then distilled and the distillate is analyzed for H-3 concentration (pCi/cc), by internal liquid scintillation spectrophotometry and the results are expressed in terms of tritium release rates. The tritium grab samples are obtained on at least a once/month basis.

5.0 BATCH RELEASES

a. Airborne All airborne effluent releases at LACBWR are from a single Continuous-Elevated Release Point.

5

EFFLUENT AND WASTE DISPOSAL REPORT - (cont'd)

b. Liquid All liquid effluent releases at LACBWR are batch releases. This is summarized as follows:

(1) Number of Batch Releases: 13 (2) Total Time Period for Batch Releases: 251.4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> (3) Maximum Time Period for a Batch Release: 27.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> (4) Average Time Period for a Batch Release: 19.3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> (5) Minimum Time Period for a Batch Release: 8.33 hours3.819444e-4 days <br />0.00917 hours <br />5.456349e-5 weeks <br />1.25565e-5 months <br /> (6) Average Stream Flow Rate During Periods of Release of Effluent into a Flowing Stream: 63038 ft3 /sec 6.0 ABNORMAL RELEASES There were no abnormal releases of radioactivity in plant effluents.

7.0 ESTIMATED TOTAL ANALYTICAL ERROR The reported analytical results contain the following estimated errors:

Counting Error 95% Confidence Level Sampling Volume Error +/- 5%.

6

EFFLUENT AND WASTE DISPOSAL REPORT - (cont'd)

TABLE 1A EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2008 GASEOUS EFFLUENTS - SUMMATION OF ALL RELEASES I UNIT QTR QTR QTR QTR TOTAL A. FISSION & ACTIVATION GASES

1. TOTAL RELEASE Ci O.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 O.OOE+00
2. AVERAGE RELEASE RATE FOR I Ci/ O.OOE+00 0.OOE+00 0.OOE+00 O.OOE+00 PERIOD Sec B. IODINE 1-131 - No longer analyzed for.

C. PARTICULATES

1. PARTICULATES WITH HALF- Ci 6.84E-8 5.63E-7 8.78E-7 8.1OE-7 2.32E-6 LIVES > 8 DAYS
2. AVERAGE RELEASE RATE FOR tiCi/ 8.80E-9 7.19E-8 1.10E-7 1.02E-7 PERIOD Sec
3. GROSS ALPHA RADIOACTIVITY Ci 5.OOE-8 6.90E-8 1.32E-7 2.70E-8 2.78E-7 D. TRITIUM
1. TOTAL RELEASE Ci 4.88E-3 5.55E-3 1.65E-2 8.52E-3 3.55E-2
2. AVERAGE RELEASE RATE FOR jiCi/ 6.28E-4 7.06E-4 2.08E-3 1.07E-3 PERIOD Sec E. PERCENTAGE OF ODCM DOSE LIMITS FOR GASEOUS EFFLUENT RELEASES QTR QTR QTR QTR YEARLY
1. NOBLE GAS RELEASE GAMMA _% .00E+00

_.__ _.__ E+00 _.__ E+00 _.__ E+00 E+00 BETA  % O.OOE+00 O.OOE+00 O.OOE+00 O.OOE+00 O.OOE+00

2. H-3 AND ALL RADIONUCLIDES IN PARTICULATE FORM WITH HALF-LIVES GREATER THAN 8

,DAYS GAMMA (Highest Organ) I% 17.96E-5 15.29E-5 4.07E-4 6.79E-5 I2.93E-4 7

EFFLUENT AND WASTE DISPOSAL REPORT - (cont'd)

TABLE 1B EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2008 GASEOUS EFFLUENTS - ELEVATED RELEASE ICONTINUOS MODE UNIT QTR QTR QTR QTR TOTAL NUCLIDES RELEASED

1. FISSION GASES KRYPTON-85 Ci O.OOE+00 O.OOE+00 O.OOE+00 O.OOE+00 O.OOE+00 TOTAL FOR PERIOD Ci O.OOE+00 O.OOE+00 O.00E+OO .00E+OO O.OOE+00
2. IODINE 1-131 - Analysis no longer required.
3. PARTICULATES STRONTIUM-90 Ci 6.84E-8 3.03E-8 3.28E-7 1.97E-8 4.46E-7 CESIUM-134 Ci O.OOE+00 O.OOE+00 O.OOE+00 O.OOE+00 O.OOE+00 CESIUM-137 Ci O.OOE+00 2.90E-7 5.50E-7 3.10E-7 1.15E-6 COBALT-60 Ci O.OOE+00 2.43E-7 O.OOE+00 4.80E-7 7.23E-7 Ci Ci Ci Ci Ci Ci TOTALS Ci 6.84E-8 5.63E-7 8.78E-7 8.10E-7 2.32E-6 8

EFFLUENT AND WASTE DISPOSAL REPORT - (cont'd)

TABLE 2A EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2008 LIQUID EFFLUENTS&- SUMMATION OF ALL RELEASES I UNIT QTR QTR QTR QTR TOTAL A FISSION & ACTIVATION PRODUCTS

1. TOTAL RELEASE (NOT INCL. Ci 3.18E-2 3.80E-2 8.47E-3 O.OOE+00 7.83E-2 TRITIUM, GASES, ALPHA)
2. AVERAGE DILUTED ptCi/ 2.45E-8 7.67E-9 4.23E-9 O.OOE+00 CONCENTRATION DURING ml PERIOD B. TRITIUM
1. TOTAL RELEASE Ci 1.44E-3 4.53E-3 5.33E-3 O.OOE+00 1.13E-2 AVERAGE DILUTED ptCi/ 1.11E-9 9.14E-10 2.66E-9 O.OOE+00 CONCENTRATION DURING ml PERIOD C. DISSOLVED AND ENTRAINED GASES
1. TOTAL RELEASE Ci O.OOE+00 O.OOE+00 O.OOE+00 O.OOE+00 O.OOE+00
2. AVERAGE DILUTED ,Ci/ O.OOE+00 O.OOE+00 O.OOE+00 O.OOE+00 CONCENTRATION DURING ml PERIOD D. GROSS ALPHA RADIOACTIVITY
1. TOTAL RELEASE Ci 5.72E-5 6.97E-5 4.74E-6 O.OOE+00 1.32E-4 E. VOLUME OF WASTE Liters 4.32E+4 1.60E+5 6.59E+4 0.00E+00 2.70E+5 RELEASED (PRIOR TO DILUTION)

F. VOLUME OF DILUTION Liters 1.30E+9 4.96E+9 2.OOE+9 2.22E+2 8.26E+9 WATER USED DURING PERIOD G. PERCENTAGE OF ODCM LIMITS FOR LIQUID RELEASES QTR QTR QTR QTR YEARLY HIGHEST ORGAN  % 12.77 11.77 2.43 0.00 13.49 WHOLE BODY  % 26.89 24.87 5.15 0.00 28.45 9

EFFLUENT AND WASTE DISPOSAL REPORT - (cont'd)

TABLE 2B EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2008 LIQUID EFFLUENTS NUCLIDES RELEASED UNIT QTR QTR QTR QTR MANGANESE-54 Ci O.OOE+00 O.OOE+00 O.OOE+00 O.OOE+00 IRON-55 Ci 0.00e+00 1.20E-5 6.51E-6 O.OOE+00 COBALT-60 Ci 1.67E-4 1.14E-3 1.26E-4 0.0OE+00 STRONTIUM-90 Ci 3.64E-4 7.06E-4 1 .95E-4 O.0OE+00 CESIUM-134 Ci O.OOE+00 O.OOE+00 O.OOE+00 O.QOE+00 CESIUM-137 Ci 3.16E-2 3.62E-2 8.14E-3 O.OOE+00 TOTAL FOR PERIOD Ci 3.22E-2 3.80E-2 8.47E-3 O.OOE+00 (ABOVE)

KRYPTON-85 Ci O.OQE+00 O.OOE+00 O.OOE+00 O.OOE+00 10

EFFLUENT AND WASTE DISPOSAL REPORT - (cont'd)

TABLE 3 EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2008 SOLID WASTE AND IRRADIATED FUEL SHIPMENTS A. SOLID WASTE SHIPPED OFFSITE FOR DISPOSAL (Not Irradiated Fuel) 6-MONTH 6-MONTH

1. TYPE OF WASTE UNIT PERIOD PERIOD TOTAL
a. SPENT RESINS, FILTER SLUDGES, m3 0 0 0 EVAPORATOR BOTTOMS, ETC Ci 0 0 0
b. DRY COMPRESSIBLE WASTE, m3 70 35.5 105.5 CONTAMINATED EQUIPMENT, ETC Ci 0.46 1.5E-3 4.62E-1 C. IRRADIATED COMPONENTS, CONTROL m3 0 0 0 RODS, ETC Ci 0 0 0
d. OTHER (DESCRIBE) m3 0 0 0 Ci 0 0 0 6-MONTH 6-MONTH.
2. ESTIMATE OF MAJOR NUCLIDE PERCENT PERIOD PERIOD COMPOSITION (BY TYPE OF WASTE) OF TOTAL CURIES CURIES Co-60 45.7 2.08E-1 5.OE-4 Fe-55 7.2 3.3E-2 1.OE-4 Ni-63 44.7 2.04E-1 9.0E-4 Pu-241 2.4 1.1E-2 4.6E-5
3. SOLID WASTE DISPOSITION MODE OF NO. OF SHIPMENTS TRANSPORTATION DESTINATION 5 Sole Use Duratek, Oak Ridge, TN 1 Sole Use Energy Solutions, Clive UT B. IRRADIATED FUEL SHIPMENTS (DISPOSITION)

NO OF SHIPMENTS MODE OF TRANSPORTATION DESTINATION NONE 11

EFFLUENT AND WASTE DISPOSAL REPORT - (cont'd)

8. 0 OFFSITE DOSE CALCULATIONS

SUMMARY

AND CONCLUSIONS:

a. Gaseous Effluent Releases The maximum quarterly offsite gamma dose due to noble gases was 0.00 mRad. The cumulative 2008 annual offsite gamma dose due to noble gases was 0.00 mRad.

The maximum quarterly offsite beta dose due to noble gases was 0.00 mRad. The cumulative 2008 annual offsite beta dose due to noble gases was 0.00 mRad.

The maximum quarterly offsite dose to any organ from the release of H-3 and all radionuclides in particulate form with half-lives greater than 8 days was approximately 3.06E-5 mRem. The cumulative 2008 annual maximum organ dose from these radionuclides was also approximately 4.39E-5 mRem.

The highest historical annual average X/Q equal to 1.82 E-6 sec/m3 for the period 1985-1987 for the worst case offsite receptor location, in accordance with the ODCM, was used to calculate these offsite dose values.

b. Liquid Effluent Releases The maximum quarterly organ dose from liquid releases was approximately 0.638 mRem. The cumulative 2008 annual organ dose was approximately 1.35 mRem. The maximum quarterly total body dose for liquid releases was approximately 0.403 mRem, and the cumulative 2008 annual total body dose was approximately 0.854 mRem.
c. Conclusion All calculated offsite doses were below ODCM limits.

12

EFFLUENT AND WASTE DISPOSAL REPORT - (cont'd)

9. 0 OFFSITE DOSE CALCULATION MANUAL (ODCM) REVIEW The ODCM was revised twice in 2008. Revision 10 changed the footnote (d) in Table 3.3.

The ODCM Revision 11 was modified to format to the current DPC word processor software being used. No changes were made to the content of the ODCM. Revision 11 to the ODCM is included in its entirety.

10.0 PROCESS CONTROL PROGRAM (PCP) REVIEW The PCP was not revised in 2008.

13

LACROSSE BOILING WATER REACTOR (LACBWR)

OFFSITE DOSE CALCULATION MANUAL Prepared b Date Health Physics Review: (21' <Jlla4-14ý m W

/o-.49- A=

Date Radiation Protection Engineer Review: _r, -4.3 -0 Date Quality Assurance Review: 4-Dt ORC Approved: a at October 2008 Revision 10 Dairyland Power Cooperative 3200 East Avenue South La Crosse, WI 54602-0817

Footnote (d) to Table 3.3 on page 47 has been deleted. This footnote added to the monthly sampling requirements for H-3 (tritium) as follows "When upper cavity is flooded or FUEL HANDLING is being performed, stack tritium grab samples will be taken at least once per seven (7) days."

This table with the H-3 analysis requirement and a form of footnote (d) was initially made a LACBWR Technical Specification (TS) requirement by LACBWR License Amendment 36, issued October 18, 1984. At that time, the footnote did not contain the words "or Fuel Handling is being performed." These words about fuel handling first appeared in the TS's issued under License Amendment 66, dated August 7, 1991, after the reactor had been permanently shut down and all the fuel removed to the FESW. No explanation or basis for the wording change has been found.

The sampling and analysis for tritium release is based on the assumption that tritium is in the form of heavy water (HTO). HTO molecules are chemically essentially the same as H20 molecules of water and will be distributed through out the water in the FESW system. Sampling is performed by condensing the water vapor in a measured volume of air being discharged at the stack in a cold trap. The condensate is then analyzed to determine the amount of tritium that was in the volume of air being discharged. Therefore, the rate of tritium release appears to be more a function of the evaporation rate from the FESW system than a function of the fuel handling itself and the timing of the fuel. handling in relation to the sampling is not critical.

The purpose of footnote (d) in the original TS (during reactor operation) was probably to ensure and enhance the sampling for tritium when the water surface area of the upper cavity was adding to the evaporation rate as well as the fact that upper cavity flooding implied that the reactor primary system (a significant source of tritium) was open and connected to the upper cavity.

After reactor shutdown the addition of the words "or Fuel Handling is being performed" may have had a similar incentive to ensure and enhance the sampling for tritium when the pool covers are removed and work is being performed that may increase the evaporation rate.

Tritium has a half life of 12.32 years, so the total source in the LACBWR facility has decreased significantly since reactor shutdown. This total source is now estimated to be approximately 171 Ci, mostly tied up in the fuel material in the sealed fuel rods and therefore not readily available for release. During reactor operation the reported measured per year release rate for tritium was approximately 125 Ci per year in liquid waste some years plus as much as 42 Ci per year in gaseous discharges up the stack. The releases for the last 5 years have been approximately 0.03 Ci or less in liquid waste and 0.02 to 0.087 Ci per year up the stack. At these low H-3 source levels the accuracy of the sampling and analysis apparently has more effect on test results than the surface area of the water exposed to evaporation or physical activity in the FESW. (The upper cavity no longer exists since the reactor vessel was removed). Therefore, the deletion of footnote (d) appears justified.

The monthly sampling for H-3 will continue.

Table 3.3 RADIOACTIVE GASEOUS WASTE SAMPLING AND ANALYSIS Release Sampling Minimum Analysis Type of Type Frequency Frequency Activity Analysis (d)

Stack Continuous (b) Weekly (a) Particulate Sample Principal Gamma Emitters (c)

Effluent Continuous (b) Quarterly Particulate Sample Sr-90 Composite Continuous (b) Weekly (a)Particulate Sample Gross Alpha Continuous (b) Noble Gas Monitor Noble Gases Gross Beta and Gamma Monthly Monthly H-3 NOTES:

(a) The filter sample shall be changed at least weekly, and filter analyses shall be completed within seven (7) days.

(b) The ratio of the sample flow rate to the sampled stream flow rate shall be known for the time period covered by each dose or dose rate calculation.

(c) The principal gamma emitters for which the LLD specification applies exclusively are the following radionuclides: Mn-54, Co-60, Zn-65, Cs-134, Cs-137, and Ce-144 for particulate emissions. This list does not mean that only these nuclides are to be considered. Other gamma peaks that are identifiable and measurable, together with those of the above nuclides, shall also be analyzed and reported in the annual Radioactive Effluent Release Report.

(d) Lower Limits of Detection (LLD) are determined in accordance with plant procedures and are calculated in accordance with criteria of NUREG-0473, Revision 2.

ODCM 47 Rev. 10

Retrieved from "https://kanterella.com/w/index.php?title=ML090690305&oldid=2148358"