Text

1991 Annual Radiological Environ Operating Rept
	ML20095K633
Person / Time
Site:	Wolf Creek
Issue date:	12/31/1991
From:	Rhodes F; WOLF CREEK NUCLEAR OPERATING CORP.
To:	; NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
	ET-92-0098, ET-92-98, NUDOCS 9205050339
	Download: ML20095K633 (145)
	v • d • e

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W($LF CREEK NUCLEAR OPERATING CORPORATION Forrest T. Rhodes V6ce Premdent Enenw*ng a Technicai servica April 30, 1992 ET 92-0098 U. S. Nuclear Regulatory Commission

.. ATTH: Docutaent Control Desk-

-Mail Station Pl-137 Washinutaa..D. C. 20555

t Docket No. 50-482: Annual Radiological Environmental

-Operating Report l:.

s. the Annual Radiological. Environmental Operating Report which is

-beau. ..ubmitted. pursuant to Wolf Creek Generating' Station (WCGS) Technical Specification 6.9.1.6, This-report covers the operation .of Wolf Creek Generating' Station--l(WCGS) . for the. period of- January 1, 1991, through December 31, 1991.

Very truly yours, ,

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/

For-est T.-Rhodes Vice President Engineering & Technical Services FTR/mes

'Attachmeat cc A. T.-Howell (NRC), w/a R.~ D. Martin (NRC), w/a

, -o. -G. A. Pick (NRC), w/a

-W. D. Reckley (NRC), w/a L

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, 9205050339 911231 c PDR ADOCK 05000482 /

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PO. Box 411/ Burhngton, KS 66839 Pnone; (316) 364-8831 An Equal Opportunity Errployer M F.HC' VET V 4

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LAttachment-'toETL92-0098' TABIE OF CONTENTS- ,

Page Li s t o E T a b l e s ' . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 ,

- List of Figures .................................................. 11 Introduction .........'.............;................'.............. 1.

I.- . Program Description ........................................ 2

- II. . Discussion of Results....................................... 6 III. Annual- Land Use Survey Re'dults and Program Revisions . . . . . . . 11 IV. Program Deviations ......................................... 13.

V. EPA Interlaboratory Comparison .rogram Results ............. L Tables ........................................................... 19 l:

Figures .......................................................... 39

' Appendix As Summary tables'in format cf..NRC Radiological Assessment Branch Technical Position, Revi sion 1. November '19 7 9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . A Appendix B: Individual Sample Results'........................... B-1

-- Appendix-C Discussion of TLD Shielding Changes.................. C-1 E-t W

Attachmero-to ET 92-0093 LIST OF TABLES Page Tab 1'e 1: 1991 Radiological Environmenta1 Monitoring Program Sample Collection ....................................... 19 Table 2: ' Sample Location Numbers, Distau+,es (miles) and' DirectlOns .............................................. 25 Table 3 - 1991 Air Particulate Samples Gross Beta Analysis Results ............................. 26 Table 4: 1991 Air Particulate Composite Quarterly Gamma Analysis Results ........................ 28.

Table 5: 1991 TLD Results ........................................ 29 Table 6: 1991 Drinking Water Samples-Gross Beta' Analysis Results ............................. 31 Table /: 1991 Surface Water Tritium Results ...................... 32 Table-8: 1991 Shoreline Soll/Botton Sediment Analysis Results .... 33 Table 9: 1991 Broad. Leaf Vegetables / Irrigated Crop Gamma. Isotopic Analysis-Results ......................... 34

. Table los 1991-Algae Analysis Results ............................. 35 Table 11: Results of the-1991 Land Use Census ................... 35 Table 12: Results-of EPA Interlaboratory Comparison Program ....... 37 i

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Attachmentit'o;ET!92-0098 LIST OF FIGURES Page Figure 1: Airborne Pathway Sampling Locations ..................... 39 Figure 2: Direct Radiation Pathway Sampling Locations ............. 40 Figure 3: Waterborne Pathway Sampling Locations .................... 41 7 Figure 4:~ Ingestion Pathway Sampling Locations .................... 42 Figure 5: Distant Sampling Locations .............................. 43 Figure'6: 1991-Airborne Particulate Activity Average Indicator and Control Value ..................... 44 Figure 7: 1991 Airborne Particulate Activity Indicator / Control Camparison ............................ 45

- Figure 8: . Airborne Particulate Gr. Beta Historical 10 Week Smoothed Avg . Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 6 4.-

?.h. Figure 9: Operational TLD Results j' -Nearsite & Control Location Averages .................... 47 -

Figure 10: Variation _of Nearsite TLD Averages Z of Control Location Values ............................ 48 Figure 11: 1991' Drinking. Water Analysis Gross Beta .............................................. 49 Figure 12: Operational Tritium Concentrations WCCL (DC and SP) _........................................ 50

, Figure 13:- Historical WCCL Tritium Data Smoothed (Average of Previous 10)......................... 51 11 t,

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y Attachment to ET 92-0098 INTRODUCTION This is the 1991 Annual Radiological Environmental Ope _ating Report for Wolf Creek Generating Station (WCGS), located in Coffey County, Kansas, approximately five miles northeast of Burlington, Kansas. This report covers the period from January 1 to December 31, 1991.

Fuel loading began at WCOS on March 12, 1985. The operational phase of the Radiological-Environmental Monitoring Program began with initial criticality on May 22, 1985, with the first detectable quantities of radioactivity reported in plant effluents in June, 1985.

This report contains a description of the Radiological Environmental Monitoring Program conducted by Volf Creek Nuclear Operating Corporation (WCNOC), results of sample analyses performed by Teledyne Isotopes, a discussion of monitoring program results, a discussion of program deviations and revisions, and a discussion of the results of the Environmental Protection Agency (EPA) Interlaboratory Comparison Program. Individual sample results and a summary of results in the Nuclear Regulatory Commission (NRC) Branch Technical Position specified format are included as appendices to the report.

No radiological' effects of plant operation were detected in airborne particulate or radiciodine filters, fish, irrigated crops, milk, or drinking water.

Tritium from routine plant releases was detected in Wolf Creek Cooling Lake (WCCL) throughout the year. Additionally, tritium was detected in two ground wat.er samples in low concentrations, just above the Lower Limit of Detection (LLD). All WCCL tritium results were below applicable reporting levels.

Activation products'were detected in aquatic plant (algae), shoreline soil, and bottom' sediment samples obtained during 1991.

Fission products were also detected in broadleaf vegetation samples. The data suggests that the activity did not result from-plant operations.

No measurable impact on human exposure due to plant operations was seen for the me.

1991 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT WOLF CREEK GENERATING STATION PAGE 1 OF 51

Attachment to ET 92-0098 1

l T. PROGRAM DESCRIPTIO!!

Radiological environmental samples were collected according to the schedule in Table 5-1 and Section 5.0 of the WCGS Offsite Dose Calculation Manual (ODCM). All samples were collected by WCNOC's Radiological Services.

-Emergency Planning, and Environmental Management Groups and sent to Teledyne Isotopes of Westwood, New Jersey for analysis. Table 1 lists sampling pathways and frequencies of sampling and analysis. Table 2 lists sample location directions and distances. Samples in addition to those required by the VCGS ODCM were obtained in conjunction with sampling efforts of the Kansas Department of Health and Environment (KDHE) and to monitor additional parameters .

During 1991, the program description and requirements were moved from WCGS Technical Specifications to the VCGS ODCM. Throughout this report, references to the WCGS ODCM are intended to include that portion of the-year in which the program was still governed by Technical Specifications.

The following is a description of the sampling and analysis program by individual pathways. Deviations are permitted from the required sampling schedule if specimens are not attainable due to hazardous conditions, seasonable unavailability, malfunction of automatic sampling equipment, and other-legitimate reasons. Deviations from the routine sampling schedule and other problems encountered during the year are described in Section IV, Monitoring Program Deviations.

Airbornet Low volume air sampling pumps continuously collected particulate samples on 47 mm glass fiber filters; samples were then drawn through charcoal canisters to collect I-131. Filters and charcoal canisters were changed out weekly, labeled, and shipped to Teledyne Isotoper for analysis. Total sample volume used to calculate air concentrations was determined from the average of the initial'and final sampling flowrate and the total time of collection. Totalizer time meter readouts are used to check elapsed time versus the run time for each air sample pump.

Gross beta analysis of the air particulate samples was performed approximately 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months following filter collection to allow decay of radon and thoron daughter products. Each filter was mounted on a stainless steel planchette and counted on an automatic alpha-beta counter.

Weekly air particulate filters were combined into quarterly composites for each location and enalyzed for gamma emitting itatopes on a Ge(Li) detector.

Charcoal canisters were routinely counted in groups of five to determine the presence or absence of I-131. Positive indication of airborne I-131 would have been supplemented by separated analysis of individual canisters for each location.

1991 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING R.EPORT WOLF C m r GENERATING STATION PAGE 2 0F 51

Attachment to ET 92-0098 l

l Air samples were collected from the three sectors with the highest ground level D/Q. the nearby community of New Strawn, and a control location.

Distances and directions to sampling locations from the plant site are listed in Tab *e 2: locations are shown in Figure 1 (nearby locations) and Figure 1 (distant locationJ).

Direct Radiation The thermoluminescent dosimeter (TLDs) used during 1991 were provided by Teledyne Isotopes. The TLDs consisted of rectangular teflon wafers impregnated with CaSO4:Dy. Prior to placement in the field, the dosimeters were annealed for at least one hour at between 250 and 260 degrees centigrade, then placed in polyethylene pouches and holders containing 0.093 inches of copper shielding to filter out low energy radiation. Additional discussion of the TLD program and results is included in Appendix C. New field dosimeters were exchanged with the exposed dosimeters and the exposed dosimeters were returned to Teledyne Isotopes for analysis. Freshly annealed control dosimeters were sent with the exposed TLDs to record transit exposures received during shipment as well as system background of the TLD reader.

Gamma exposures were measured on a Teledyne Model 8300 TLD reader; individual dosimeters were then re-irradiated with a known exposure from a Cs-137 source and read again to determine individual dosimeter calibration factors.

In general TLDs were located 3-4 feet above the ground on utility poles; they were placed inside either plastic thermostat boxes or fiberglass air particulate sampler housings to protect them from moisture and tampering.

Two TLDs were placed at each location to provide duplicate measurements.

TLD locations are shown on Figure 2 (plant vicinity) and Figure 5 (distant). Table 2 provides distances and directions of each location from the WCGS site.

Waterbornet All water samples were sent to Teledyne Isotopes for analysis and were analyzed on a Ge(Li) detector to determine if gamma emitters were present.

In addition to gamma analysis, a radiochemical analysis for I-131 was performed on drinking water and ground water samples. Gross beta analysis was also performed on drinking water samples. T-itium analysis was performed by liquid scintillation counting on a quarterly basis for drinking water and on a monthly basis for surface water. Tritium analysis for ground water.was performed quarterly by gas counting. All water sampling locations are listed in Table 2 and shown in Figures 3 and 5.

1991 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT WOLF CREEK GENERATING STATION PAGE 3 0F 51 I

Attachment to ET 92-0018 Drinking water sampling locations are at the water treatment stations for the towns of Burlington (upstream control location) and LeRoy (downstream indicator location). Monthly composite samples of drinking water were collected by continuously drawing aliquots at one hour intervals.

Grab samples of surface water were collected on a monthly basis. Surface water sampling locations are at the John Redmond Reservoir outfall (control) Wolf Creek Cooling Lake discharge cove (indicator), and Wolf Creek Cooling Lake mein dam (indicator).

Ground water samples were collected quarterly. Ground water is sompled from three wells located hydrologically downgradient from Wolf Creek Cooling Lake and from an upgradient control well.

Semiannual samples of shoreline sediment were collected from the discharge cove area (location 'DC' on Figure 3) of Wolf Creek Cooling Lake. Gamma analysis was performed on each sample.

Semiannual samples of bottom sediment were collected from the discharge cove area (location 'DC' on Figure 3) and from the ultimate heat sink (location "UES' on Figure 3) of Wolt Creek Cooling Lake. Control samples were obtained from John Redmond Reservoir (location 'JRR' on Figure 3). Gamma analysis was performed on each sample.

Semiannual. samples of aquatic vegetation were co'.lected from the dischstge cove area (location 'DC' on Figure 3) of Wolf Creek Cooling Lake. Gamma analysis was performed on each sample.

Jnnestion:

Milk samples were collected on a semi-monthly basis from April through November (while milk animals were on pasture grass) and on a monthly basis the remainder of the year (when animals were on stored feed). During-1991 there were no locations for milk produced for human consumption in the vicinity (within a 5 miles) of the plant. Thus only control samples were obtained. Samples were sent to Teledyne Isotopes where radiochemical analyses for I-131 and gamma analyses were performed on each sample. The location is shown in Figure 5.

Broadleaf vegetation samples were collected monthly during the growing season from three gardens identified as having highest D/Q values.

Alternate sampling locations were also used when quantities of vegetation were limited, such as early or late in the growing season or during dry periods. Additionally, samples of crops irrigated with water from the Neosho River downstream (indicator) of effluents of Wolf Creek Cooling Lake were collected during or shortly after harvest. An irrigated crop control sample is obtained upstream of the confluence of Wolf Creek and the Neosho River. All vegetacion samples were sent to Teledyne Isotopes and analyzed by gamma spectroscopy. Locations are shown in Figures 4 and 5.

1991 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT WOLF CREEK GENERATING STATION PAGE 4 0F 51

Attachment to ET 92-0098 Fish samples were collected semi-annually with several recreationally important species being sampled. Samples of boneless meat portions were sent to Teledyne Isotopes and analyzed by gamma spectroscopy. Locations are shown in Figure 4.

Annual game animal and bird samples were obtained in the immediate vicinity of Wolf Creek Cooling Lake. Samples of boneless meat portions were sent to Teledyne Isotopes and analyzed by gamma spectroscopy. Control samples were obtained in the vicinity of Hartford, Kansas. Other control samples were obtained (milk, air, and broadleaf vegetation) in or near Hartford.

All sampling locations above are listed in Table 2.

1991 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT VOLF Cit m GENERATING STATION PAGE 5 OF 51

-Attachment to ET 92-0098' II. -DISCUSSION OF'RESULTS

. Analysis results for all pathways are summarized in Appendix A using the '

format described in NRC Radiological Assessment Branch Technical Position, Revision 1. November 1979 results for individual samples are listed in Appendix B.;

In this section, results are discussed by pathway and analysis type.

Operational results are related to c,ntrol location results, preoperational values sources of radioactivity, and effluent releases when applicable.

Trends or, seasonal 1 effects seen in-the data are also discussed.

Airborne

.Results of gro s beta analysis of weekly air particulate filters are shown

'in Table 3. In addition, the four indicator locations are averaged and plotted graphically with the control location in Figure 6. Figure 7 illustrates the ratio of the average indicator value to the control value for each week expressed as a percentage.- Figure 8 illustrates ' smoothed"

-historical data trends for airborne particulate gross beta analyses. Each data point represents an average of ten values with the tenth value corresponding to the date represented on the graph (x-axis). The smoothed-graph should illustrate long term trends and minimize the effect of randem-

-fluctuations. Figures 6, 7, and 8 demonstrate the indicator and control locations trending closely together.

'The gross. beta values for the second week of 1991 (1/08 - 1/15) were elevated compared f to the gross beta results for the rest of the' year. No iodine activity was detected for.the same sample period. The first quarter air particulate' composite gamma analysis (which would have included the week in question) showed no irregularities. The control location gross beta was also elevated. No direct cause fer the eleveted values has been determined. ~Since both the control and indicator location.results trended

together, the elevated gross beta values were'not attributed to plant-operation.

No airborne radiciodines were detected during .the year.

Results of the quarterly gamma analysis of air particulate filter composites are summarized in Table 4. The table shows that naturally occurring Be-7 and K-40 were detected-regularly, as was the case during preoperational monitoring.

No effects of plant operation were seen via the airborne pathway for the year.

e 1991 ANNUAL RADIOLOGICAL ENVIR0lOGGITAL OPERATING REPORT WOLF CREEK GENERATING STATION PAGE 6 OF 51

Attachment to ET 92-0098 Direct Radiation:

Quarterly gamma exposures measured at eaca location for 1991 are shown in Table 5. Values are normalized to a standard 90-day quarter.

Results from TLDs-located near the plant site (less than approximately three mile distant), which would be most sensitive to changes due to plant operation, were combined into quarterly averages. These nearsite averages, using locations 1, 2, 7, 8, 9, 10, 11, 12, 13, 14, 18, 25, 27, 28, 29, 30, 37, and 38, era compared to control TLD (locations 39 and 40) results in Figure 9. h- addition, the percentage of the nearsite averages to the control locations results are displayad graphically in Figure 10. These figures also includ.s preoperational data for comparison. Note that the nearsite average exposures trended higher than the control locations both prior to and after WCNOC began operation.

During 1990, the thickness of the shielding material used with the TLDs was changed. The former shields consisted of 0.022 inch thick copper while the latter consisted of 0.093 inch thick copper. As stated in the 1990 Annual Report, an evaluation of the two shield thicknesses was conducted for three quarters during 1990 and 1991. The evaluation results and discussion are contained in Appendix C.

No changesEto area gamma exposure rates as a result of plant operation were identified.

Waterborne Drinking Water Results of gross beta analysis of lnking water samples are listed in Table ,

6; Figure 11 depicts these results graphically.

No effects of operation were evident in drinking water analyses.

Surface Water Tritium, attributable to WCGS-operation, was detected in all surface water samples collected from WCCL in 1991. A total of 717.2 Curies were released to WCCL during the year. Measured concentrations are shown in Table 7. In Figure 12. WCCL tritium concentrations are plotted since WCGS began operation. Figure 13 illustrates a "smootned" 10 point average plotted vs.

time. The date of the tenth data point of each average correspcads with the dates on the x-axis.

It can be seen in Figures 12 and 13 that nonthly surface water tritium concentrations appear to be slightly increasing since plant start-up. This is expected until the lake concentration reaches equilibrium. A discussion of the predicted equilibrium concentration for tritium was included in the 1990 Annual Report.

1991 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT WOLF CREEK GENERATING STATION PAGE 7 0F 51

Attachment to ET 92-0098 I

All tritium concentrations measured were below applicable reporting levels.

There were no gamma emitters detected in surface water for the year.

An additional surface water location SP (ALT) was added to the sample collections in August 1990 and continued through April 1991 in anticipation of moving the spillway sampling point. The location was moved from SP to SP (ALT) and redesignated as SP in May to facilitate sampling and improve general sampling safety. The present sample point is on the WCCL Main Dam several yards east of its previous location, beside the auxiliary spillway which allows discharges from VCCL. The results indicated that moving the sample location did not have any appreciable affect on the analysis rasults, Ground Vater Tritium was detected in two ground water locations during 1991. The concentrations were 140 +/- 70 pCi/ liter at B-12 (control) and 190 +/- 90 pCilliter at C-49 (indicator) during the third quarter. The LLDs for ground water tritium ranged from 90 to 200 pCi/ liter for the year. A discussion of tritium levels in various waterborne pathways is included in Appendix C of the 1990 Annual Radiological Environmental Operating Repert. In that Appendix, dose projections for higher historical ground water tritium concentations (810 pCilliter) were discussed. The dose contribution due to the low ground water tritium concentrations found during 1991 was negligible.

The only gamma emitter detected in any ground water sample was K-40 (5.08 pCilliter) at location B-12 on 5/21.

Shoreline Sediment Table 8 shows gamma emitters detected in shoreline soil collected during 1991. In addition to the naturally occurring nuclides (K-40, Ra-226, and Th-228), two other radionuclides were detected. Co-58 and Co-60 were detected in the sample collected on October 9, 1991. This activity would be attributable to plant operations.

Inzestion Milk There were no indicator sonples available during 1991 (see Program Deviation section for explanation). A control sample was routinely obtained for analysis. All milk samples analyzed contained naturally occurring K-40 at concentrations consistent with preoperational levels. The yearly average concentration was 1260 pC1/ liter.

No other gamma emitters were detected.

1991 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT WOLF CREEK GENERATING STATION PAGE 8 OF 51

Attachment tO ET 92-0098 Food and Garden Crops Gamma analysis of broadleaf vegetation samples revealed naturally occurring gamma emitters K-40 and Be-7 at concentrations comparable to preoperational and background levels.

Cs-137 was also detected at Locations R-1 (indicator) and S-4 (control) during July. The concentrations-were 0.0431 pCi/gm and 0.213 pCi/gm respectively. In addition, Cs-137 was detected at Location G-1 in September, 0.0218 pCilgm. These concentrations for Cs-137 are attributed to fallout. The range of f allout Cs 137 seen in preoperational samples was 0.0131 to 0.0478 pCilgm. Also, Cs-137 was not detected in the airborne effluent releases from the plant during the third quarter of 1991. Finally, Cs-134 was not detected, although it would be expected if the occurrence of Cs-137 was related to plant operation (Cs-134 decays with a shorter half-life than Cs-137: detection of Cs-137 alone indicates older fallout as opposed to newly produced fission products).

No other gamma emitte.s were detected for the remainder of the year, and no effects of plant operation were identified.

In addition to brcadleaf vegetation, crop samples were collected which were irrigated with water from the Neosho River below the Wolf Creek Cooling Lake outfall. Gamma analysis revealed naturally occurring K-40 to be present in the samples, with no nuclides detected which could be attributable to plant operation.

Fish Naturally occurring K-40 was found in all fish samples collected with an average concentration of 4.63 pCi/gm (vet weight) for WCCL samples and 6.88 pCilgm (wet weight) for the control samples. These concentrations are within the range reported during the preoperational period.

No other radionuclides were detected in fish during the year.

Special Samples (not recuired by Technical Soecifications):

Game Animal and Bird Naturally occurring K-40 was measured in all game animal and bird samples at concentrations consistent with preoperational levels.

No other radionuclides were detected and no effects of plant operation were seen for this pathway.

1991 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT WOLF CREEK GENERATING STATION PAGE 9 OF 51 I

1

' Attachment to ET 92-0098 Bottom Sediment Table 8 shows gamma emitters detected in bottom sediment samples collected from Wolf Creek Cooling Lake and John Redmond Reservoir during 1991. In addition to the naturally occurring nuclides (K-40, Ra-226, and Th-228),

several other radionuclides were detected.

Co-58 and Co-60 are activation products whose presence in the WCCL samples is attributed to. plant operation.

The Cs-137 concentrations measured are considered to be primarily due to fallout rather than plant operation since they are at or below concentrations measured during preoperation studies and are comparable to the concentrations seen.in the control sample from John Redmond Reservoir.

Also, Cs-134 was not detected although it would be expected if the occurrence of Cs-137 was related to plant operation.

Aquatic Vegetation A combination of naturally occurring nuclides, fission products, and activation' products were detected in an algae sample from the WCCL discharge

-cose during the year. Rooted aquatic vegetation was not available again this year. A summary of the concentrations measured is shown in Table 10.

Naturally occurring nuclides measured were Be-7, K-40, Ra-7.26, and Th-228.

Activation products seen in the sample was Mn-54, Cr-51, Co-58, and Co-60; all of.these are attributable to operational releases.

Fission products Cs-137 and Cs-134 were detected in the algae sample. The fission products seen in the algae samples are due to fallout and plant effluents. Preoperational algae samples did contain measurable concentrations of Cs-137. However,the concentration of Cs-137 measured in the algae sample is slightly higher than the range of concentrations measured during the preoperational phase of environmental monitoring. The detection of Cs-134 implies a recent source of activity.

1991 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING .LEPORT WOLF CREEE GENERATING STATION PAGE 10 OF 51 l-

e r i

JAtt6chtent to ET 92-0098 1 l

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- III. ANNUAL tman USg SURVEY RESULTS AND PROGRAM REVISIONS The purpose of the_Lan'dLUse Census is to identify within a distance of 5 miles the location in each of.the 16' meteorological. sectors the nearest-residence, the nearest mila animal, and the nearest garden of greater than 50 square meters producing broadleaf vegetatica.

The 1991 Annual Land Use Survey was completed in October. Information was

- collected using a combination of mailed survey _ forms, telephone contacts, and door-to-door contacts. In the summary of changes shown below, each noted change is presented in the format: Location designator / Distance from the plant in miles.-- Table 11 summarizes the results of the Survey.

Comparing this year's results to the 1990 census results, the nearest resident location has changed in Sectors C F. K, L. and P.

In' sector C the nearest resident is no longer at C-12/1.9 mi. but is now at C-01/2.0 mi.

! In sector F!the nearest resident is no longer at F-07/1.9 mi. but is now at j F-01/1.8 mi.-

In sector K the nearest resident-is no longer at K-06/2.6 mi. but is now at K-01/4.1 mi.

-In sector P the' nearest resident is no longer at P-26/2.8 mi but is r.. at P-02/2.9 mi.

The only other move affecting this category is L-9/2.1 mi. to L-01/2.1 mi.,

which is a move that affects location and not distance from the plant.

As in 1990, there was no milk production for human consumption identified in

'the area covered by the survey.-

The resident at A-04-did not indicate any dairy cattle this year, contrary to what they had indicated in the past.

The resident at B-06 indicated that dairy cattle were being kept at that-

^ location but they were being used to raise calves and no milk _was produced-for human consumption.

. The residents at D-03 and M-19-have indicated dairy cattle in past surveys and~have not' historically participated in the.REMP. In 1990, management of the cattle at M-19 changed from milk production to breeding purposes only.

The residents at-D-03:and M-19 did not respond to the 1991 survey nor could; they be-contacted by telephone or personal visits.

1991 ANNUAL EADIOLOGICAL ENVIRONMENTAL OPERATING REPORT WOLF CREEK GFXERATING STATION PAGE 11 0F 51

l

. Attachnient to ET 92-0098- l l

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The last change-in 1991 is at location F-13. The resident at F-13 did not

' indicate' owning goats as.they have in the past.

Several location changes were noted for the' nearest garden in Sectors C. F.

H, L,.N.-P,_and Q.

In sectoro F,-H, and P. residents had' moved which resulted in the nearest garden in the sector now being located farther from the plant.

In several sectors residents had moved that resulted in gardens that are in closer proximity to the plant. Those include C-02/2.2 mi. to C-01/2.0 mi.,

L-16/3.1 mi.-to L-03/2.8 mi., and Q-04/3.2 mi. to Q-03/2.3 mi.

No gardensLwere identified in sector N last year. A garden was reported at N-03/2~6 mi.-this year.

Based on the data obtained from the 1990 Land Use Census-no changes vero required for-the Radiological Environmental Monitoring Program.-- As in the past,_it should.be noted that dose calculations are performed for'airborno

---and liquid pathways forLa hypothetical individual at the exclusion area boundary in the highest X/Q andLD/Q sector-(for airborne pathways)~and at the. circulating water discharge point-(for liquid pathways). Calculated doses are.therefore not_affected by changes in residence, milk animal, and broadleaf vegetation locations identified by the Annual Land Use Survey.

i, L

ii - 1991~ ANNUAL RADIOLOGICAL ENVIR0leGNTAL OPERATING REPORT WOLF CREEE GENERATIEG STATION PAGE 12 0F 51 l

'Attachttent to ET 92-0098 IV. PROGRAM DEVIATIONS Airborne Location 2 (1/23/91 to 1/30/91): WCNOC air sampling pumps'used to obtain RDIP air: samples are equipped with totalizer meters that indicate motor run time-in hours. Data is recorded weekly to calculate both the elapsed time (clock time) and the totalizer (motor:run time) time since the prior weck's filter / cartridge ~ replacement.; Normally the time readings from the-totalizer a.e used to calculate the flow volume through the filter and cartridge. A comparison is made between the elapsed-tits .nd the totalizer time to ens'are

'that the pump has run during the entire previous week to collect samples.

During normal weekly changeout of the particulate filter and charcoal cartridge, a_ discrepancy of approximately 21 hours2.430556e-4 days 0.00583 hours 3.472222e-5 weeks 7.9905e-6 months was discovered between the elapsed clock time.and the sampling pump hour totalizer. No power L outages had occurred during the sampling periods therefore the totalizer-

[' readings were' suspect. The-discrepancy was resolved through several actions. The calculated ~ elapsed time, rather than totalizer readings was used:to-calculate-the flow volume for the sampling period. The vendor was notified of.the corrected-volume calculations. The pump was removcd from service, Subsequent: testing confirmed that the totalizer was faulty. After the: totalizer'was replaced, the pump was run for several hours to confirm operability prior to its-return to service.

First-Quarter 1991: Following normal quarterly replacement of air sample

-pumps for. maintenance and calibration, several of the recently removed pumps were found;to-have undergone calibration shifts. . A subsequent evaluation of theLcalibration shifte was performed with respect _to Regulatory Guide 8.25,

' Calibration and-Error-Limits of= Air Sampling Instruments for Total. Volume of. Air Sampled".. The evaluation found that in each case the calibration shifts were-within the criteria set forth in the Regulatory G,2ide

. mentioned. .No further evaluation was necessery.

LAll Locations, 06/04/91 to 06/11/91 -Miscalculated air sampl6 volumes were cent with the: particulate filters.and charcoal cartridges to the-vendor for-analysis. The error.was discovered, reported to the program coordinator, and the vendor was notified. No further corrective actions were necessary. -

Location 3.-09/10/91 to 09/17/91: An erroneous air sample volume was sent to.the vendor with.the particulate filter and charcoal cartridge for analysis. -TheLerror was. discovered, reported to the program coordinator, and.the vendor notified prior to analysis. No further corrective actions were necessary.

l 1991 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERAYING REPORT l WOLF CREEE GENERATING STATION PAGE 13 0F.51 m

Attachment to ET 92-0098 Location 37, 10/22/91 to 10/29/91: An air sample was not collected for the

-specified time period. The air sample pump was not running when personnel arrived at the sample station for routine sample collectior The inoperative pump was replaced with a spare air sample pump. A defective power switch was found to be the cause. The switch was replaced during routine calibration and maintenance. The pump was run for several hours to confirm operability prior to returning the pump to the field.

Waterborne Location LW-40 Drinking Water, 02/05/91 to 03/05/91: The automatic composite drinking water sampler malfunctioned due to a loose intake tube.

The problem apparently occurred early in the month because of the small volume of sample collected, approximately 50 ml. Normally, over the course of a month approximately 7 to 9 liters are collected by the samplers. The sampler appeared _to be operating correctly and should have collected the sample had the intake tubing been connected. The cause of the disconnected tubing is unknown. Corrective actions included reconnecting the intake tubing, manually confirming the operability cf the sampler, and obtaining a grab sample. The sampler was. returned to service the same day as the problem was discovered. 03/05/91. The grab sample was analyzed since no composite sample was available. The sampler has since been replaced with a new, more reliable automatic composite water sampler.

Location BW-15, Drinking Water, 02/05/91 to 03/05/91: This deviation, while concurrent with the drinking water deviation above, was unrelated to the above noted deviation. The automatic composite drinking water sampler malfunctioned due to a burst intake tube. The problem apparently occurred early in the month because of the small volume of sample collected. The burst tubing allowed the sample to leak from the sample-pump prior to the sample being deposited in the collection container. Otherwise, the sampler appeared to be operating correctly and should have collected the sample had the intake tubing not burst, Corrective actions included replacing the intake tubing, manually checking the operability of the sampler, and obtaining a grab sample. The sampler was returned to service the same day

-as the problem was discovered. 03/05/91. The sampler has since been replaced with a new, more reliable automatic composite water sampler.

Locations LW-40 and SW-15, Drinking Water, 11/05/91 to 12/03/91: The semples (approximately 1 gallon) were obtained as scheduled from both drinking water sample points. Recent sampling procedure revisions directed that sample information and/or calculations be reviewed prior to shipment for analysis by a second qualified person. No additional qualified 1991 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT WOLF CREEK GENERATING STATION PAGE 14 0F 51

TAttachment to ET 92-0098 personnel were available to review the sample data at the time, so shipment of the drinking water samples was-delayed until the review could be performed. In the time between sampling and shipping, the sample containers both leaked. Approximately 1300 mis and 900 mis of the samples .

respectively, were recovered. The sample containers were of a different design than those usually used to ship REMP samples to the vendor. The containers did not have any markings to indicate that they were not of a leakproof design. Subsequent telephone conversations with the vendor confirmed that the amounts of each sample recovered were su' c! ant to perform the gross beta and gamma isotopic analyses. The amount of cample

-recovered was not sufficient to perform radioiodine distillations (necessary to attain the required I-131 LLD) on either sample. On 12/06/91, additional grab samples from both sample locations were obtained and shipped to the vendor for I-131 analyses. The non-leakproof sample bottles were removed from the stock'of REMP supplies to prevent their future usage.

Locations SP and SP (ALT), Surface Water. 01/15/91: No surface water samples were obtained because the sample points were covered by ice. These samples are not required by the WCGS ODCM.

Locations B-12, C-10, C-49, and D-65, Ground Water, 03/08/91: The ground water samples were obtained and shipped to the vendor as scheduled. An isolated vendor error caused the samples in questi)n to be lost. VCNOC was promptly notified and the locations were resampled on 03/12/91. The resampling occurred within the grace period allowed per the WCGS ODCM. The second set of samples were sent to the vendor and the analyses were completed properly.

Aouatic Vegetation:

Location DC. Aquatic Plants. While not required per the WCGS ODCM, aquatic plants are normally cosampled semiannually with the KDHE_from company owned property and continue to be collected when available. No rooted aquatic plants were available in the sampling location. An algae sample we.s obtained in October.

l l

l i

l 1991 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT i WOLF CREEK GENERATING STA* TION PAGE 15 0F 51 r

I

f,ttachment to ET 92-0098 Direct Radiation:

All locations, first and second quarter 1991' In the 1990 Annual Radiological. Environmental Operating Report, it was noted that shields of improper *hickness had been used with the direct radiation samplers. Two shield thicknesses had been used. 0.093 inches and 0.022 inches. The use of the improper 0.022 inch thick shields could have caused the TLDs to over respond by up to 2.5 times for gamma rays of less than 200 kev. As stated in the 1990 Report. one TLD with 0.093' shielding and one TLD with 0.022' shielding were placed at each station for the fourth quarter 1990 and the first two quarters of 1991 to gather data for evaluation of possible impact on historical exposures. The TLD data for the first two quarters of 1991 shown in Tcble 5 does not reflect the exposure data from those TLDs that utilized the 0.022 inch thick shields. A more thorough discussion of the results is included in Appendix C.

Location 16, first quarter 1991: Both TLDs at this location were missing, along with the small housing used to protect them from environmental conditions. Apparently the pole used to support the TLD station had been removed by a utility crew sometime during the quarter. A new station was attached to's nearby tree and the samples were gathered at this location during the remaining quarters of the year.

Ingestion:

Milk:

There were no deviations in milk sampling. However, there are still no indicator sampling locations available within five miles of the plant.

Refer to Section III. Annual Land Use Survey Results and Program Revisions.

Broadleaf Vegetation:

Broadleaf vegetation is sampled when seasonably available. No broadleaf vegetation deviations occurred during 1992. Listed below are those sample

' locations and dates when the samples were unavailable. No corrective actions were n cessary. Samples are collected at the secondary location G-1 when samples are unavailable at the primary locations A-1 and R-1.

1991 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT WOLF CREEK GENERATING STATION' PAGE 16 OF 51

. .- _ . . . . - - - - - - _ . . - . . . __ _ . _ . . . m E>i ttachment t'o ET 92-0098 ,

~ ?

4;; > ,

2 All: locations -(4/91):: . Samples unavailable,

-Gardens:not yet_ established.

~

Location G-1,(5/91): Sample unavailable.

Locations G-1, R-1 (8/91) Samples unavailable.

Dry and hot conditions.

' Location'R-1, (9/91): Sample ansvallable.

' ~

.R-1 done producing for season.

Locations G-1, R-1,.S-4 (10/91) Samples' unavailable, Nearing end of growing season.

-All Locations (11/91). Samples unavailable,

~

Growing season completed ,

p-l-

n i

l :. i F

i_ _

u

( 2-I.

!I i

r- 1991 AIGtDAL RADIOLOGICAL ENVIR0lGGNTAL OPEEATING REPORT b il0LF CREEK GENERATING STATION PAGE 17 0F 51

kttachmentto,ET 92-00981 s

?

S?7 ~ V. EPA TETN AMARATORY CCMPARISON PROGRAM RESULTS r

Teledyne.I'sotopes is contracted to perform radiological-analysis of-environmental' samples for WCNOC. _Teledyne participated in the EPA

.Interlaboratory Comparison Program during 1991; s

' Table-12-shows=intercomparison test results received during the--year. "he:

table ~1ists thetsample number and.date, the sample media, the nuclide or

.-analysis-type, the known value reported by the_ EPA, the measured value reported by,Teledyne-Isotopes (based on triplicate analysis), and-_the normalized-deviation from the known. Results are listed in the table for-sample media ~and analysis types' corresponding to those performed for WCNOC.

-- The gross alpha results for the air sample dated 3/29/91 were higher _than the EPA value.- A second sample dated 8/30/91 was analyzed after corrective

~

actions were performed ~and results were in agreement with EPA values.-

p _ The K-results for the Milk sample-dated 09/27/91 were lower than the EPA L

value.:-The associated _ footnote-(d) explains results.

~

An earlier sample

- showed?K:to be in agreement-with the EPA. samples.

Teledyne has-provided additional training for technicians for water gross alpha and beta analyses.- Weekly gross alpha and beta spikes have since been

-performed with both accurate and consistent results.

n \

m l

i l..

1991 ANNUAL RADIOLOGICAL ENTIR0lGENTAL OPERATING REPORT WOLF CREEK GENERATING STATION PAGE 18 0F 51 l

a.

-_ y...- . _ . . . ._ . _ - . . . ~ _ - . _ _ _ _ . . _ .

Attachment't01ETf92-0098 TABLE 1 1991 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM SAMPLE COLLECTION EXPOSURE NUMBER OF SAMPLES ' SAMPLING AND TYPE AND FREQUENCY PATHWAY / AND COLLECTION- 0F ANALYSIS SAMPLE- SAMPLE LOCATIONS FREQUENCY AIRBORNE

-Iodine & Samples from five Continuous sampler Analyze radioiodine particu-- locations operation with canister weekly for lates sample collection I-131.;

. Samples from loca- weekly, or.more ,

tions near the site Lfrequently if Analyze particulate boundary-in three required by dust filter. weekly for sectors having the loading, gross beta acti-u highest calculated ivitys perform l annual ~ average-D/Q quarterly gamma

-(Locations 2, 3 and isotopic analysis 37 on Figure 1) - -camposite (by loca-tion). .

Sample from the vicinity of a _

community having the highest calculated annual average D/Q (Location 32 on Figure 1 New Strawn);

Sample from aEcontrol location:10.- 20 miles distant in-a low D/Q sector-(Location 40 on

-Figure 5).

DIRECT RADIATION' 40 routine monitoring -Quarterly Gamma dose stations with two or ; quarterly more dosimeters measur-ing dose _ continuously, placed as follows:

~

1991 ANNUAL RADIOLOGICAL ENVIROBBGDITAL OPERATING REPORT WOLF CREEK GENERATING STATION PAGE 19 0F 51

,a - . . - - -- -

Attachment to ET 92-0098

)

TABLE 1 (cont'd) 1991 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM SAMPLE COLLECTION EXPOSURE NUMBER OF SAMPLES SAMPLING AND TYPE AND FREQUENCY PATHWAY / AND COLLECTICN OF ANALYSIS SAMPLE SAMPLE LOCATIONS FREOsENCY DIRECT RADIATION (cont'd)

An inner ring of sta-tions one in each meteorological sector 0 - 3 mile range from the-site (Locations 1 -

, 14, 12, 26 - 31, 37, and 38 on Figure 2).

An outer ring of sta-tions, one in each-meteorological sector i 3 - 5 mile range from l- the site (Locations 15, 16, 17, 19 - 22, 24, 25, and 32 - 36 on Figure 2).

I The balance of the sta-tions to be placed in l special interest areas

! such as population cen-ters (Locations 23 and 32), nearby residences (Many locations are near a residence), schools l~ (Location 23), and in one i or two areas to serve as control stations 10 - 20 miles distant from the site (Locations 39 and 40). (Locations are on Figures 2 and 5)

Locations 41, 42, and 43'on Figure _2 are not part of the required program but have been added as special inter-est locations.

1991 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT WOIJ Cu m GENERATING STATION PAGE 20 0F 51

Attachment to ET 92-0098 TABLE 1 (cont'd) 1991 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGPM SAMPLE COLLECTION EXPOSURE NUMBER OF SAMPLES SAMPLING AND TYPE AND FREQUENCY PATHWAY / AND COLLECTION OF ANALYSIS SAMPLE SAMPLE LOCATIONS FREQUENCY WATERBORNE Surface One sample upstream Monthly grab sample Monthly fanma iso-(Location MUSH on topic ar alysis and Figure 3) and two composite for samples downstream tritium analysis (Locations DC and SP quarterly, i on Figure 3) l An additional sample, SP(ALT),in the same vicinity as SP has been added in preparation for relocating SP.

Ground Samples from one or Quarterly Quarterly gamma two sources only if isotopic and likely to be affected. tritium analysis.

Indicator samples at

, locations hydrologi-l cally downgradient of the site (Locations C-10, C-49 and D-65 on Figure 3); Control sample at a location hydrologically upgra-dient of the site I

l (Location B-12 on Figure 3).

l .-

Drinking Sample of municipal Monthly composite Monthly gamma iso-water supply at an topic analysis l indicator location and gross beta downstream of the site analysis of compos-l (Location LW-40 on ite sample. Quar-Figure 5); control terly tritium anal-sample from location ysis of composite.

upstream of the site (Location BW-15 on Figure 3).

1991 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT WOLF CREEK GENERATING STATION PAGE 21 OF 51

I !

Attachment to ET 92-0098 TABLE 1 (cont'd) 1991 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM SAMPLE COLLECTION EXPOSURE NUMBER OF SAMPLES SAMPLING AND TYPE AND FREQUENCY PATHWAY / AND COLLECTION OF ANALYSIS SAMPLE SAMPLE LOCATIONS FREQUENCY WATERBORNE (cont'd)

Shoreline One sample from the Semiannually Semiannual gamma Sediment vicinity of Wolf isotopic analysis. '

Creek Cooling Lake discharge cove (Loca.

I tion DC on Figure 3) ,

and one sample from John Redmond Reservoir (Location JRR on Figure 3).

Bottom One sample from the Semiannually Semiannual samma Sediment vicinity of Wolf isotopic ane. lysis.

Creek Cooling Lake discharge cove (LocS.

tion DC on Figure 3) and one sample from John Redmond Reservoir (Location JRR on Figure 3). Special samples were taken in tPs vicinity of tne Ultis:ste Heat'dink.

Rooted One sample from the Semiannually Semiannual gamma Aquatj es vicinity of Wolf isotopic analysis, or Algae Creek Cooling Lake discharge cove (Loca.

tion DC on Figure 3).

INGESTION Milk Samples frem milking Semimonthly while Gamma isotopic animals at three animals are on enalysis and indicator locations pasture (April to I-131 analysis within 5 miles of the November): monthl) of each sample, i

site having the at other times l

highest dose poten- (December to March).

tial (currently there 1991 ANNUAL RADIOLOGICAL ENVIRONKl:NTAL OPERATING REPORT WOLF CREEK GENERATING STATION PAGE 22 0F 51

Attachment to Ei 92.^098 TATLE 1 (cont'd) 1991 PADIOLOGICAL ENVIRCNMENTAL MONITORING PROGRAM SAMPLE COLLECTION EXPOSURE NUMBER OF SAMPLES SAMPLING AND TYPE AND FREQUENCY PATHVAY/ AND COLLECTION OF aft. LYSIS SAMPLE SAMPLE LOCATIONS FREQUENCY INGESTION (cont'd)

Milk are nu locations pro-(cont'd) ducing milk for human consumption within 5 miles of the site):

one sample from a con-trol location greater than 10 miles from the site (Location S 3 on Figure 5).

Fish Indicator samples of Semiannually Gamma isotopic 1 to 3 recreation &1ly Analysis on edible important species from portions.

Wolf Creek Cooling Lake (several sampling areas indicated on Figure 4): control samples of similar species from John Redmond Reservoir indicated on Figure 4).

Broadleaf Samples of available Montt - <nen Gamma isotopic Vegetation broadleaf vegetation avaitable analysis on edible from two indicator portions.

locations with highect calculated annual aver-age D/Q (Locations A-1 and R-1 and alternate Location G-1 on Figure

4) sample of similar i broadleaf vegetation from a control location greater than 10 miles from the site in a low D/Q sector (Location S-4 on Figure-5).

l l 1991 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT l WOLF CREEK CENERATING STATION PAGE 23 0F 51

Attachment t0 ET 92-0098 TALLE 1 (cont'd) 1991 RADIOLOGICAL ENVIR0! MENTAL MONITORING PROGRAM SAMPLE COLLECTION EXPOSURE NL"ABER OF SAMPLES SAMPLING AND TYPE APID FREQUENCY PATHWAY / AND COLLECTION OF ANALYSIS SAMPLE S AMPLE LOCATICNS FREQUENCY INGESTION (cont'd)

Irrigated Sample of crops irri- At time of harvest Gamma isotopic Crops gated with water from analysis on edible the Neosho River down- portions.

stream of the Neosho River - Wolf Creek con-fluence (Location NR-D2 on Figure $). Control cample of crops irri-gated with water from the Neocho River up-stream of the Neosho River - Wolf Creek con-fluence (Location NR-U1 on Figure 5).

Game birds Indicator samples of Annually Gamma isotopic and rsgion specific analysis on edible animals recreationally impor- portions.

tant species from the vicinity of Wolf Creek Lakes control samples of similar species from the vicinity of John Redmond Reservoir.

1991 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT VOLF CREEK GENERATIRG STATION PAGE 24 0F 51

Attaetvnent to E192-0098 TABLE 2 SAMPLE LOCATION NUMBERS. DISTANCES iles) AND DIRECTIONS Location Distance / Location Distance / Location Distance /

Number. Direction Number Direction Number Direction TLD and Ait Particulate 1 1.4/N 15 4.5/ESE 29 2.6/SSW 2 2.7/N 16 4.2/E 30 2.2/W 3 3.0/NNE 17 3.6/SE 31 3.0/WNW 4 4.0/NNE 18 3.2/SSE 32 3.2/WNW 5 4.0/NE 19 4.0/SSE 33 3.7/WNW 6 4.4/ENE 20 3.3/S 34 4.0/NW 7 1.9/NE 21 3.8/S 35 4.6/NNW 8 1.6/NNE 22 4.1/SSW 36 4.2/N 9 2.0/ENE 23 4.5/SW 37 2.1/NNW 10 2.4/ENE 24 4.1/VSW 38 1.2/NW 11 1.5/E 25 3.6/W 39 13.0/N 12 1.8/ESE 26 2.6/VSW 40 >15.0/WNW 13 1.5/SE 27 2.1/SW 41 0.8/NNW 14 2.6/SE 28 2.8/SW 42 0.8/SSE 43 0.8/WNW Ground Vater, Drinking Water Surface Water B-12 2.2/NNE BW-15 3.9/SW MUSH 3.6/W C-10 2.8/W LV-40 10/SSE DC 0.6/WNW C-49 2.9/SW SP 2.9/S D-65 3.9/S SP(ALT) 2.9/S Milk Broadleaf Venetation Irrigated Croce S-3 >15.0/WNW A-1 1.4/N NR-U1 4.2/SW R-1 2.1/NNW NR-D2 >10.0/S G-1 1.6/SE S-4 >15.0/WNW Fish Shoreline and Bottom Aquatic Vegetation Sediment /Alnae WCCL 0.6/WNW DC 0.6/WNW DC 0.6/WNW JRR 4/W JRR 4/W UHS 0.6/E Game Birds and Animale WCCL General Vicinity JRR General Vicinity 1991 ANNUAL *ADIOLOGICAL ENVIRONNfltTAL OPERATING REPORT VOLF CREEK GENERATING STATION PAGE 25 0F 51

Attachment to ET 92-0098 TABLE 3 1991 AIR PARTICULATE SAMPLES GROSS BETA ANALYSIS RESULTS (pCi / cubic meter)

DATE INDICATOR LOCATIONS INDICATOR STANDARD CONTROL LOC 2 LOC 3 LOC 32 LOC 37 AVERAGE DEVIATION LOC 40 01/02 - 01/08 0.057 0.047 0.048 0.053 0.0513 0.005 0.052 01/08 - 01/15 0.089 0.086 0.080 0.079 0.0835 0.005 0.081 01/15 - 01/22 0.032 0.033 0.025 0.031 0.0303 0.004 0.031 01/22 - 01/30 0.026 0.024 0.024 0.021 0.0238 0.002 0.030 01/30 - 02/05 0.035 0.tJ6 0.033 0.034 0.0345 0.001 0.031 02/05 - 02/12 0.024 0.023 0.024 0.031 0.0255 0.004 0.028 02/12 - 02/19 0.025 0.024 0.025 0.026 0.0250 0.001 0.025 02/19 - 02/26 0.021 0.020 0.021 0.024 0.0215 0.002 0.022 02/26 - 03/05 0.024 0.018 0.029 0.028 0.0249 0.005 0.027 03/05 - 03/12 ( . 0.' 5 0.022 0.027 0.025 0.0248 0.002 0.027 03/12 - 03/19 0.c47 0.015 0.016 0.017 0.0163 0.001 0.015 03/19 - 03/26 0.022 0.020 0.023 0.024 0.0223 0.002 0.023 03/26 - 04/02 0.022 0.022 0.023 0.026 0.0233 0.002 0.020 04/02 - 04/09 0.022 0.026 0.026 0.030 0.0260 0.003 0.023 04/09 - 04/16 0.018 0.019 0.016 0.019 0.0180 0.001 0.017 04/16 - 04/23 0.017 0.016 0.017 0.020 0.0175 0.002 0.020 04/23 - 04/30 0.019 0.014 0.019 0.015 0.0168 0.003 0.018 04/30 - 05/07. 0.017 0.016 0.016 0.016 0.0163 0.001 0.016 05/07 - 05/14 0.018 0.017 0.021 0.020 0.0190 0.002 0.018 05/14 . 05/21 0.015 0.016 0.011 0.016 0.0145 0.002 0.015 05/21 - 05/28 0.015 0.016 0.016 0.014 0.0153 0.001 0.014 05/28 - 06/u4 0.017 0.015 0.021 0.020 0.0183 0.003 0.019 06/04 - 06/11 0.021 0.021 0.021 0.021 0.0210 0.000 0.020 06/11 - 06/10 0.018 0.022 0.020 0.019 0.0198 0.002 0.018 06/18 - 06/25 0.014 0.030 0.027 0.028 0.0248 0.007 0.027 06/25 - 07/02 0.018 0.023 0.018 0.019 0.0195 0.002 0 013 07102 - 07/09 0.026 0.030 0.029 0.025 0.0275 0.002 0.028 07/09 - 07/16 0.021 0.024 0.019 0.024 0.0220 0.002 0.022 07/16 - 07/23 0.028 0.034 0.029 0.031 0.0305 0.003 0.031 07/23 - 07/30 0.022 0.023 0.022 0.023 0.0225 0.001 0.021 1991 ANNUAL RADIOLOGICAL ENVIROPMENTAL OPERATING REPORT WOLF CREEE GENERATING STATION PAGE 26 0F 51

+ Attachment t0 ET 92-0098 TABLE 3 (Cont'd) 1991 AIR PARTICULATE SAMPLES OROSS BETA ANALYSIS RESULTS (pCi / cubic meter) r DATE -INDICATOR LOCATIONS INDICATOR STANDARD CONTROL l LOC 2 LOC 3 LOC 32 LOC 37 AVERA0E DEVIATION LOC 40- i 07/30 - 08/06 0.031 0.033 0.033 0.029 0.032 0.002 0.027 08/06 - 08/13 0.022 0.027 0.025 0.024 0.025 0.002 0.022 08/13 - 08/20 0.026 0.030 0.029 0.026 0.020 0.002 0.027 08/20 - 08/27 0.039- 0.038 0.037 0.037 0.038 0.001 0.036 08/27 - 09i".3. 0.027 0.026 0.028 0.027 0.027 0.001 0.026 t 09/03 - 09/10 0.020 0.023 0.022 0.025 0.023 0.002 0.024

.09/10 - 09/17. 0.023 -0.019 0.020 0.021 0.021 r. "2 _0.017

.09/17 - 99/24 0.020 0.019 0.018 0.022 0.020 0.002 0.029 09/24 - 10/01 0.022 0.020 0.022 0.022 0.022 0.001 0.017 j 10/01 - 10/08 0.033 0.026 0.030 0.027 0.029 0.003 0.026 10/08 - 10/15 10.032 0.030 0.036 0.031 0.032 0.003 0.030 10/15 v 10/22 0.023 0.019 0.028 0.027 0.024 0.004 0.028 10/22 - 10/29' O.024 -0.024 0.020

0.023 0.002 0.019 10/29 . 11/05 0.032 0.029 0.048 0.032 0.035 0.009 0.030 11/05 _11/12 0.036 .0.033 0.040 0.039 0.037 0.003 0.032

.11/12 - 11/19 0.040 0.034 0.035 0.038 0.037 0.003 0.033 11/19 - 11/26 0.024 0.023 0.025 0.031 0.026 0.004 0.021 11/26 - 12/03- 0.028 0.028 0.034 0.026- 0.029 0.003 0.032 12/03'--12/10 0.030- 0.029; 0.030 0.025 0.029 0.002 0.029.

12/10 - 12/17 0.032 0'.026 -0.032 0.028 0.030 0.003 0.027 12/17 - 12/23 0.018 0.019 0.020 0.019 0.019 0.001 0.022 12/23 - 12/30 0.028 0.029 0.032 0.022- 0.028 0.004 0.030 s

- Sampling equipment malfunction, see Section IV.

, /

f 1991 ANNUAL RADIOLOGICAL ENVIRONGNTAL OPERATING REPORT W

_ OLF CREEK GENERATING h.fATION PAGE 27 0F 51

, _ _ _ - , . . _ _ a _ -.. - . . _ . _ _ _ - - , _ _ _ . _- u

Attachment to ET 92-0098 TABLE 4 1991 AIR PARTICULATE COMPOSITE QUARTERLY GAMMA ANALYSIS RESULTS (pci / cubic meter)

INDICATOR LOCATIONS CONTROL ISOTOPE QTR LOC 2 LOC 3 LOC 32 LOC 37 LOC 40 BE.7 1 0.0594 0.0575 0.0583 0.0652 0.0759 2 0.0509 0.0771 0.0641 0.0738 0.0744 3 0.0616 0.0750 0.0607 0.0727 0.0636 4 0.0591 0.0518 0.0641 0.0479 0.0532 K-40 1 ND HD ND HD ND 2 ND ND ND ND ND 1

3 ND ND ND ND ND 4 0.0053 ND 0.0107 0.0118 0.0153 ND - NOT DETECTED No other gacma emitters detected.

1991 ANNUAL RADIOLOGICAL ERVIROISENTAL OPERATING REPORT VOLF CREEE GENERATIBG STATION PAGE 28 0F 51

l l Attachment to ET 92-0098 TABLE 5 1991 TLD RESULTS (mR / Standard Qtr*)

FIRST** SECOND** THIRD FOURTH QUARTER QUARTER QUARTER QUARTER LOC AVG SLEV AVG SDEV AVG SDEV AVC SDEV 1 15.8 0.7 15.9 2.2 15.5 1.1 16.2 0.7 2 13.0 1.8 13.1 2.2 13.7 0.7 14.9 1.0 3 16.8 0.4 15.6 3.5 14.3 0.9 15.5 0.8 4 15.3 0.1 14.2 0.9 14.9 0.4 16.2 3.3 5 14.5 0.8 15.2 1.6 14.2 1.2 14.4 0.6 6 14.4 2.9 12.8 0.5 14.3 1.5 15.z 0.8 7 14.1 1.0 12.4 1.2 13.7 1.3 13.5 1.0 8 16.3 0.7 14.5 1.7 15.4 0.7 16.1 0.8 9 13.6 1.3 13.4 0.6 13.7 0.5 14.9 0.9 13 15.4 0.7 15.0 0.8 17.1 1.0 15.4 0.8 11 17.4 1.4 15.1 1.8 16.0- 1.5 16.6 1.0 12 15.4 1.2 13.8 1.9 15.3 0.4 15.5 0.9 13 15.9 2.1 15.4 4.9 16.2 0.7 15.8 1.3 14 16.2 0.8 13.8 0.8 15.7 0.7 15.8 0.7 15 12.9 0.6 13.3 1.3 15.3 0.7 15.7 0.9 16 *** *** 14.1 1.5 14.8 0.7 15.0 0.9 17 12.9 1.1 12.7 1.0 15.2 0.9 14.6 1.8 18 13.6 1.1 18.0 5.4 26.4 6.2 16.2 1.3 19 13.5 0.9 14.3 1.4 15.7 0.8 14.8 0.6 20 13.5 0.8 13.4 1.6 15.7 0.9 15.4 1.5 21 11.4 0.5 11.8 5.0 13.3 0.4 14.0 1.2 22 13.1 0.9 14.1 1.2 15.L 0.9 14.8 0.9 23 13.8 1.0 13.6 1.2 14.8 1.2 13.9 3.5 24 13.1 0.3 14.1 1.2 15.4 0.5 15.7 0.7 25 11.8 0.8 10.8 0.9 10.8 3.6 13.8 1.2 26 11.7 0.3 11.9 3.0 13.8 0.8 14.7 1.1 27 14.3 0.7 13.6 1.4 15.8 1.0 16.0 1.3 28 11.4 0.6 12.3 1.0 13.7 0.7 13.7 0.7 29 10.8 0.1 12.1 0,9 11.9 0.7 13.0 0.6 30 13.6 0.6 13.4 1.1 14.8 0.7 14.8 0.8 1991 ANNUAL RADIOLOGICAL ENVII.0!GGNTAL OPERATING REPORT VOLF CREEK GENERATING STATION PAGE 29 0F 51 4

Attachment to ET 92-0098 TMLE 5 (Cont'd) 1991 TLD RESULTS (ra / Standard Otr*)

FIRET** SECOND** THIRD FOURTH QUARTER QUARTER QUARTER QUARTER LOC AVG SDEV AVG SDEV AVG SDEV AVG SDEV 31 13.1 0.6 15.1 2.0 15.3 1.0 15.1 0.9 32 12.5 0.6 12.6 0.9 15.4 0.9 15.1 0.9 33 14.7 0.8 15.2 1.4 16.9 1.3 14.8 1.3 34 13.7 0.6 14.5 1.0 16.3 1.4 16.4 0.6 35 13.5 0.5 14.7 1.3 16.6 0.9 15.8 0.7 36 13.3 0.5 14.2 1.0 15.8 0.8 15.3 0.9 37 12.5 0.9 13.2 1.2 14.1 2.4 15.1 0.6 38 14.3 0.7 15.0 1.9 17.4 0.7 16.2 1.4 39 13.3 0.7 13.7 1.6 14.8 0.8 15.7 0.7 40 11.9 0.3 11.7 0.9 14.1 0.6 13.7 1.1 41 14.3 2.1 13.9 1.A 1Ao 5 0 15.3 ^9.

42 8.9 1.4 9.0 0.8 9.6 0.6 10.6 0.4 43 8.4 0.3 8.6 0.2 9.3 1.0 9.5 0.7

- 90 days per Standard Quarter

- - Based on the results of one TLD due to shield thickness discrepancy. See Appendix C.

- - - TLDs missing, no data available.

1991 AMMUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT WOLP CREEK GENERATING STATION PAGE 50 0F 51 ,

L Attachment to ET 92-0098 l'

TABLE 6 !

i l

1991 DRINKING WATER SAMPLES i GROSS BETA ANALYSIS RESULTS l (pci / Liter)

MONTH CONTROL INDICATOR' BW15 LW40

, JAN 12.0 +/- 2 12.0 +/. 2 FE8 8.0 +/- 1.4 6.6 +/- 1.3 !

MAR 5.6 +/- 2.1 6.7 +/- 2.3' APR 9.1 +/- 1.6 6.8 +/- 1.4 I

E HAY 8.5 +/- 1.6 7.1 +/- 1.5 JUN 8.2 +/- 1.5 8.4 +/- 1.6 JUL 8.6 +/- 1.4 7.4 +/- 1.4 ,

AUG 8.6 +/- 1.5 6.6 +/- 1.4 ,

SEP 8.9 +/ 1.4 11.0 +/-- 2 ,

OCT 7.1 +/- 1.3 6.9 +/- 1.5 NOV 3.9 +/- 1.6 6.0 +/- 1.9 DEC 7.0 +/- 1.7 7.3 +/--1.3 No gamma emitters or tritium were detected in drinking water samples during 1991. ,

1991 AMWUAL RADIOLOGICAL ENVIRONGNTAL OPERATING REPORT WOLF CREEK GENERATING STATION PAGE 31 0F 51

_ _ . . _ . _ . - __. ..~.. ~ . - _ _ _ . _ . _ , - - . . - _ . . _ , . . . . . . . _ . - , _ - . _ . . _ - - -._

Attachment to ET 92-0098 TABLE 7 1991 SURFACE VATER TRITIUM RESULTS (pci / Liter)

INDICATOR LOCATIONS CONTROL DATE DC SP SP ALT MUSH 01/15 6700 +/- 600 NS NS < 800 02/19 6400 +/- 500 7200 +/- 500 6300 +/- 500 < 500 03/19 6900 +/- 700 7000 +/- 700 7400 +/- 700 < 1000 04/16 6600 +/- 600 6800 +/- 700 6600 +/- 600 < 900 05/21 7100 +/- 600 8400 +/- 600 N/A < $00 06/18

10000 +/-1000 7500 +/- 600 N/A < 900 06/18 10000 +/ 1000 7500 +/- 600 N/A < 900 07/16 9000 +/- 700 8900 +/- 700 N/A < 900 07/16 ** 8600 +/- 500 08/20 8300 +/- 600 8500 +/- 500 N/A < 500 09/17 7300 +/- 600 7700 +/- 60f N/A < 900 10/15 d500 +/- 700 8500 +/- 700 N/A < 600 11/19 9300 +/- 500 7400 +/- 500 N/A < 900 12/17 7300 +/- 500 6600 +/- 500 N/A < 600

- Samples reanalyaad for confirmation per VCHOC request.

- - Duplicate analysis. Teledyne QC check.

NS - Not sampled, somple unavailable see Section IV, >

' Monitoring Program Deviations N/A- Sample location no longer apolicable, see Section II. +

' Discussion of Results'.

1991 ANNUAL EADIOLOGICAL ENVIRONMENTAL OPERATING REPORT WOLF CREEK GENERATING STATION PAGE 32 0F 51

_ ~_ - - - - . . . - - .

Attachment to ET 92-0098 TABLE 8 1991 SHORELINE S0IL ANALYSIS RESULTS

( pCi / gram. dry )

LOCATION DC JRR* DC DATE 04/16 04/16 10/09 K-40 1.02 +/-0.10 1.18 +/-0.12 9.57 +/- 0.96 CO-58 < 0.04 < 0.04 0.0758 +/-0.0398 CO-60 < 0.04 4 0.04 0.0715 +/-0,0072 CS-134 < 0.04 -< 0.04 < 5.0 CS-137 < 0.04 < 0.03 < 5.0 RA-226 1.47 +/-0.50 1.55 +/ .53 2.77 +/- 0.59 TH-228 -0.88 +/-0.09 1.42 +/-0.14 1.25 +/- 0.13

- JRR designated as control location.

No other gamma emitters detected during 1991.

1991 BOTTOM SEDIMENT GA)MA ANALYSIS RESULTS (pci / gram - dry)

DC JRR DC JRR UBS DATE 04/16 04/16 09/19 09/19 09/19 K-40 13.7 14.4 14.3 15.4 12.8 C0-60 0.436 < 0.04 0.658 '< 0.02 0.059 CS-134 < 0.06 < 0.05 < 0.04 < 0.02 < 0.04 CS-137 .0.446 0.225 0.463 0.255 0.286 RA-226 2.14 2.21 1.97 2.21 2.07 TH-228 1.28 1.27 1.36 1.32 1.21

. 1991 A9NUAL RADIOLOGICAL ENVIROG GNTAL OPERATING REPORT l WOLF CREIE GENERATING STATION PAGE 33 0F 51

. . __ . . _ - - - , _ _ _ . - - _ . - . . - - . _ - ~ . .. _ _ _ - . - . _ . _ , . _ _ . . --_ .-..--

Attachment to ET 92-0098 TABLE 9 1991 BROAD LEAF VEGETABLES GAMMA ISOTOPIC ANALYSIS RESULTS (pCi / gram - vet)

LOC TYPE DATE BE-7 K-40 CS-137 A-1 SWISS CHARD 05/28 0.41 4.84 < 0.01 A-1 SWISS CRARD 06/25 0.102 1.62 < 0.02 A-1 SWISS CHARD 07/23 0.605 1.44 < 0.02 A-1 SWISS CEARD 08/27 0.887 1.41 < 0.01 A-1 SWISS CHARD 09/24 0.369 5.32 < 0.009 A-1 SWISS CHARD 10/22 0.253 0.105 < 0.01 G-1 LETTUCE 06/25 0.713 6.37 < 0.02 G-1 LETTUCE 07/23 0.333 5.32 < 0.01 G-1 LETTUCE 09/24 0.466 6.81 0.0218 R-1

LETTUCE 35/28 0.848 4.36 < 0.02 R-1

LETTUCE 06/25 0.372 8.92 < 0.02 R-1

LETTUCE 07/23 0.22 2.14 0.0431 S-4 CABBAGE 05/28 0.454 3.05 < 0.01 S-4 CABBAGE 06/25 0.428 4.21 < 0.03 S-4 CABBAGE 06/25 0.549 2.95 < 0.02 S-4 CABBAGE 07/23 0.756 5.35 0.0213 S-4 CABBAGE 08/27 0.811 1.46 < 0.009 S-4 CABBAGE 09/24 0.636 3 < 0.006 1991 IRRIGATED CROP GAHHL ISOTOPIC ANALYSIS RESULTS (pci / gram - wet)

NRD1 CORN 10/22 ND 2.91 < 0.01 NRD2 CORN 09/17 ND 3 < 0.02 NRD2 SOYBEANS 10/22 ND 15.6 < 0.02 NRUl* CORN 09/24 ND 2.04 < 0.004 No other gamma emitters were detected during 1991.

- Control locations: S-4 for Broad Leaf Vegetables, NRU1 for Irrigated Crops.

ND - None Detected 1991 ANNUAL RADIOLOGICAL ENVIRoltiENTAL OPERATING REPORT WOLF CREEK GENERATING STATION PAGE 34 0F 51

i

~

L Attachment to ET'92-0098 s

TABLE 10 1991 ALGAE ANALYSIS RESULTS (pc1 / gram-wet)

. LOCATION DC.

DATE 10/15 STD NUCLIDE CONC DEV BE 0.591 +/- 0.017 e

K-40 2.11 +/- 0.21 MH-54 0.486 +/- 0.049 CO-58 1.27 +/ 0.13-CO-60 2.33 +/- 0.23 CS-134 0.795 +/- 0.080 CS-137 1.24 + - 0.12 RA-226- 0.507 +/- 0.268 TH-228 0.299 +/-~0.030 CR-51 0.561 +/- 0.149

.No'other gamma emitters were detected.

during 1991.

3 . Rooted aquatic vegetation was unavail-able at Location DC. .

~ 1991 AIOtUAL RADIOLOGICAL ENTIl010GNTAL OPERATING REPORT WOLF CREEK GEIIERATING STATION PAGE 35 0F 51

Attachment to ET 92-0098 TABLE 11 Results of the 1991 Land Use Census No. of Total Responses / Listance (miles)/ Location of Nearest Sector Population

Households, Residence Milk Animal Garden A 41 7/7 1.4/A-01 NONE/** 1.4/A-01 B 18 6/9 3.1/B-02 4.1/B-06** 3.1/B-02 C 21 8/11 2.0/C-01** NONE/ 2.0/C-01 D 15 5/8 2.1/D-01 NCNE/ 2.1/D-01**

E 16 5/7 1.8/E-01 NONE/ 1.8/E-01 F 36 12/15 1.8/F-01** NONE/** 1.8/F-01**

G 19 8/10 1.6/G-01 NONE/ 1.6/G-01 U 25 8/10 3.1/H-02 NONE/ 4.9/H-06**

J 16 5/9 3.3/J-01 NONE/ 3.8/J-02 K 10 5/6 4.1/K-01** WONE/ 4.1/K-01 L 64 23/31 2.1/L-01** NONE/ 2.8/L-03**

M 40 16/20 2.4/M-02 NONE/** 2.4/M-02 N 10 5/8 2.1/N-01 NONFl 2.6/H-03**

P 52 17/24 2.9/P-02** HONE / 4.7/P-03**

Q 14 7/10 1.4/Q-02 NONE/ 2,3/Q-03**

R 9 5/6 2.1/R-01 NONE/ 2.1/R-01 406 142/13 ,

Excludes residents of Burlington New Strawn and Barrett's Trailer Park.

- Indicates change from 1990 data.

1991 ANNUAL B*DIOLOGICAL ENVIRONMENTAL OPERATING EXPORT WOLF CREEK GENERATING STATION PAGE 36 OP 51

Attachment to ET 92-0098

\

TABLE 12 RESULTS OF EPA INIERLABORATORY COM?ARISON PROGRAM COLLECTION TELEDYNE li[pl6 NUCLIDE EPA RESULT' Q ISOTOPES RESULT (b)

DATE_

01/25/91 Water Gr-Alpha 5.0 t 5. 9.00 1 1.00 Gr-Beta 5.0 1 5.0 7.00 1 0.00 02/08/91 Vater Co-60 40.0 t 5.0 39.33 t 3.06 Zn-65 149.0 t 15.0 147.00 t 1.00 Ra-106 186.0 1 19.0 176.67 t 17.56 Cs-134 8.0 t 5.0 7.33 1 0.58 Cs-137 8.0 t 5.0 7.67 1 3.21 Ba-133 75.0 t 8.0 '5.67 t 5.51 02/15/91 Water I-131 75.0 t 8.0 p;.00 t 5.29 02/22/91 Water H-3 4418.0 t 442.0 4500.00 t 173.21 03/29/91(c) Air Filter Gr-Alpha 25.0 t 6.0 42.67 1 0.58 Gr-Beta 124.0 + 6.0 126.67 t 5.77 Co-137 40.0 .t 5.0 43.00 t 5.29 04/16/91 Lab Perf. Gr-Alpha 54.0 1 14.0 59.67 t 4.04 Water Gr-Beta 115.0 t 17.0 110.00 t 0.00 Cs-134 24.0 t 5.0 25.00 t 1.00 Cs-137 25.0 1 5.0 24.00 1 1.73 04/26/91 Milk I-131 60.0 t 6.0 53.33 1 2.31 Cs-137 49.0 1 5.0 52.67 t 1.53 K 1650.0 t 83.0 1590.00 t 61.85 05/17/91 Water Gr-Alpha 24.0 t 6.0 24.33 1 2.52 Gr-Beta 46.0 t 5.0 50.33 1 1.53 06/07/91 Vater Co-60 10.0 t 5.0 10.33 t 0.58 Zn-65 108.0 1 11.0 106.00 t 2.65 Ru-106 149.0 t 15.0 ,

136.67 t 3.79 Co-134 15.0 t- 5.0 13.67 t 1.53 Cs-137 14.0 t 5.0 13.67 1 1.53 Ba-133 62.0 1 6.0 56.31 t 1.53 06/21/91 Water H-3 12480.0 t 1248.0 12833.33 1 115.50 08/09/91 Vater I-131 20.0 t 6.0 19.33 t 0.58.

08/30/91 Air Filter Gr-Alpha 25.0 t 6.0 27.00 t _2.00 Gr-Beta 92.0 t 10.0 100.00 t 0.00 Cs-137 30.0 t 5.0 33.33 1 3.21 See footnotes at end of table.

1991 ANNUAL RADIOLOGICAL ENVIROlGENTAL OPEPATING RXPORT VOL' CREEK GENERATING STATION PAGE 37 0F 51

l Attachment 10,ET 9?-0098 l l

TABLE 12 (Cont'd)

COLLECTION TELEDYNE DATE M{DIA NUCLIDE EPA RESUL?ta) ISOTOPES RESULT (b) 1 9/20/91 .ter Gr-Alpha 10.0 t 5.0 11.67 t 0.58 Gr-Beta 20.0 t 5.0 21.00 t 0.00 9/27/91(d) Milk I-131 108.0 1 11.0 113.33 1 5.77 Cs-137 30.0 t 5.0 29.00 t 3.61 K 1740.0 t 87.0 1503.33 + 75.06 10/04/91 Lab Perf. Co-60 29.0 t 5.0 30.33 7 2.08 Water 2 r. - 6 5 73.0 1 7.0 72.67 t 7.09 Ru-106 199.0 t 20.0 197.67 1 7.51 Cs-134 10.0 t 5.0 10.33 i .58 Cs 137 10.0 t 5.0 11.33 t .58 Ba.133 98.0 1 10.0 97.00 t 8.72 10/18/91 Water H-1 2454.0 1 353.0 2333.33 t 57.74 10/22/61(.) Lab Perf. Gr-Alpha 82.0 t 21.0 55.00 t 4.36 Vater Gr-Beta 65.0 t 30.0 56.00 1 1.00 '

Co-60 20.0 t 5.0 19.67 1 0.58 Cs-134 10.0 t 5.0 10.33 t 2.08 Cs-137 11.0 t 50 13.67 1 0.58 Footnotes:

(a) EPA Rest' 1-Expected laboratory precision (1 sigma). Units are pC1/11tet for water and milk except K is in mg/ liter. Units are total pCi for air particulate filters.

(b) Teledyne Results - Average i one sigma. units are pCi/ liter for water and milk except K is in mg/ liter. Units are total pCi for air particulate filters.

(c) The sample presents a different counting geometry. The EPA deposits activity in a 3/4 inch diameter circle, on a plastic disk approximately 3/32 inch thick. A special calibration for EPA filters will be performed. The laboratory has obtained blank filters from the Las Vegas facility, and will simulate their deposits.

(d) There is no apparent cause for the low K-40 results. Two other isotopes -spiked in the sample were in good agreement with EPA values. Unit conversions were reviewed and found to be correctly applied. Possible background errors in geometry were investigated and found to have an insignificant effect.

(e) Probably failure to transfer all sample residue to the counting planchet. Analysts are being tested using in-house and other EPA spikes, l-l

!. 1991 ANNUAL RADIOLOGICAL ENVIRONMEh'TAL OPERATING REPORT WOLF CREEK GENERATING STATION PACE 38 0F 51

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-1991 ANNUAL RADIbi,0GICAL ENVIRONMENTAL OPERATING REPORT WO'F CREEK GENERATING STATION PAGE 41 0F 51

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1991 ANNUAL RADIOLOGICAL ENVIROIRGNTAL OPERATING REPORT WOLF CREEK GENERATING STATION PAGE 42 0F 51 l .. . . _ . . . . . _ _. .._ _ ~ _ ._

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...... .. .. . .... .... , , ,- r C 1980 19 81 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 o

' YEAR / QUARTER

$ o (AVGIPO/CNTRU 100

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Attachment to ET 92-0038 I'

FIGURE 12 i.

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(J90 / JOd) uoneJ4uecuoO C-H g 1991 ANNUAL PADIOLOGICAL ENVIROBENTAL OPERATING M ET WOLF CREEK GENERATING STATION. PAGE 50 0F 51

s , , ,

! Attachment to ET 92-0098 4

FIGVRE 13

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( 1991 AENUAL RADIOLOGICAL ENVIRONGNTAL OPERATING REPORT l WOLF CREEK GERERATING STATION PAGE 51 0F 51

g i l Attachment.to~ET-92-0098:

n

' Appendix A i a

. Summary tables _in format of NRC Radiological

, _ -Assessment-Branch Technical Position Revision 1. November 1979

(

.m 4

=

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. 1991' ANNUAL RADIOLOGICAL ENVIROIGGDfTAL OPERATING REPORT' PAGE 1 OF 9 WLF CnRust GENERATING STATION APPENDIX A r

s

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i

' ENVIRONus'VTAL HADIOLOGICAL MONTIORING PROGdAM SUMMAHY 5 l 8~ Name of Factitty Wolf Creek Nurtnr Deket No.STN 50-482 ,

O g Heporung Iblal Armaul IW1 m 1 locauon of Facility Co5ev Cmmfy. W==== a g (County. State)

N Number of b umi Iower IJmit O T umber of All Irmlicator locanorm locallon with litatni Anne ul (0 Mean Cunite(Iccrits Nonroutine Heported

'h H

Medium of Pathway Sampled e4 Analyssa Detec.Jon " Mean (0

- Ha nge Name "Mean Distasice and Directions "Hange "Mean (O "Hasive Measurements **

O IUnit of Measurement) Performed n a n) Stataan No 40 g

Q 26152/52) 0 ow 3 26(207/207) 32 3.2 miles NNW 27(52/52)

Air Particulate Cross (250) (11 80) (13 88) v) (11-89) d h (X10-3 pCA/Cu.MJ Ekta l N. -(0/207) N/A N/A -(0/52)

H I-131 (259) 7 ..

l e ..

un J o l

Casnma (20) 67(4/4) 6 714 / 4) O 11e 7 1 63(16/16) 40 >l5 miles WNW

! (53-76) (53 761

'b (48-77)

O 15(t/4) 15(1/4) .)

K 40 24 9.415/16) 40 >l5 miles WNW -

(5.3 121 H 8tataoma 39 and 40 0.22(8/8) 4 .S(16/16 O 11D (338) 0.05 0.17(302/302) 18 3.2 miles SSE

% External (O.10-0 33) 10.15-0.30) 8,.13 0.181 Ha&u.wi Qua stesy g (mH/ day) pa H

h*

nm

>0 m

N..minal tower i tents a4 incere skni (lJ in) tras skwi eA sictettable snemme*<canrnas as spesshe<i km ashnes is esiuk .saeel en g,asenstwn 40

- Mr.in as e.ange Lama-d upeas detra table pecamurenwsnes analy.

I W

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e ENVIRONMEFRAL HADIMICAL MONTIURING PROGRAbl

SUMMARY

$$ Name of Facility Wolf Creek Naarbe Docket No STM 50-482 y

o qe" m locauori of Fuisity Cosev C==w. h--- Reporting 1%:tal Anzuut 1991 'H (County. State) e Nuh of 7io N and lower LAmit Anm ut Mean C9aind ImtaHons Nonroutine O

T Huanber of All famlicator Imcadens locamm with Ittatwst "Mean (0 **Mean (4 Heported O-Medium of Pathway ~ Meati (0 Name Measureme nt s" 'D h

s Sampled ofAsuntyees Detecuan "Ha nge Destaru arwf Diseccons " Range "Hange o a f Al J. Redmond Ramervoer (11 nit of Measurement) Performed gf Flah Camma (91 O JRR 4.0 miles W 6.9(3 / 31 6 913/3)

.$ (pC8/g wet) 0.5 4.6(6/6)

K-40 (2.9 - 14) (2.9-141

> (2.8- 10)

N o

s 8-4 Fwxt azul Gamuna (18) 0.Gl(6/6) O

'ssden Cropa 0 71(12/12) H 12.1 miles NNW l.l(3/31 (pC1/g vet lle 7 0.09 (0.37-2.2) (0.43 0.81)

% (0.25 2.2) weight) l o 12(3/38 3.3(6/6) O m H 12.1 miles NNW 0.5 10(12/121 f

a K 40 (4.4 21)

(4.4-21) (1.5 5.41 0.021(1/6) O 5 R-12.1 nulem NNW O.043(1/31 O Cs-137 0.08 0.032(2/12) --

10.021-0.043) g -(0/61 O M R 1 il miles NNW O.58(1/41 Ra-226 0.2 0.5811/ I2) ..

M H

-10 /68 0 H-12.1 antles NNW O.10( t /3) l Th -228 0.,02 0.079(2/121 -

(0.054 0.10)

NRU1

O g t. Irngated Crop Gamma (4) 2.O(I / II O Nu (ICS/g dry weight) K-40 0.5 7.213/3) NRD2 > 10 males S 9 3(2 /21 (3.0 161

>o'1a (2.9 - 16) e

Nosi.assel leswer BJmit 44 Deses thsen (Il Di Fret llues ad O *ct'adLIc measutresicalls at opnified $stdiumsy is igulas died $st pasentheres (Q

Mrdas msed f estgr ladssed upeess ale 8cc tal>$c 3Bardstaf rainctits essily.

l . _ _ _

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~ bi-ENVIHONIP 'hMAIMOLDGICAL MOldlVHING PROGRAM

SUMMARY

'5' 65

~e Name of Factisty WaK Crealt Nuclear Duchet h.S'IN 50 482

-o-c+

'J i 4mcaSsiofFaceasy C<Eev C-- '= w ~- - Heporung Period Aa-*8 l'rJ1 ~

m 4

ICounty. Statel

'. N. -

Number of <>'

.g Ana and I-.- IJsst .. . .

O-Mumiber es . All tamhcator Imr*8" locaHon wHh Haghea,a Annual. Mean Csa;1ndhn selons Monsuuune W 6 Medstam of Pathway . T Name "Mean to "Mean te - s Reported ofAn.dyede ~ Detecuen " Mears (4 g Sampled ,

n I n) - ** Ha nge Destann and D6tections " Range " Hasige'- Measuresne nt s" t-. (Unit of Measurement) Pericisad Sea.aon S-3 Q8 oH 0

'l-131 (21) -3 -- -- 10/21) cn Milk Q . IPC1/8 +

+4 H Gamuna (21)

E ps 100 -- 1268121/21' 0' o K-40 --

(900 15901 o

'Is a

o 3

4 '

t k

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n.

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N.nesatssel 14nnarr (Amst al ikses siosi (1114

. "- M..n asui sange based upon detetattic measu.enients only. li sm uusi of detract. isle me.susements as spre ssard I.m .tnosas is temissaned asi pasesaliemes 40

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5G Name of Facility Wolf Creek Nuclear Docket NoSIN S0-482 o r* e me m Locauon of Facility Co8cv County. Kan==__ Heporting Pered Arnuul ILFJi

og2 (County. State) so ,

d -

7 o

o ob Nun.uer of g AnayAsand lower Limst All Irdinia *e::t.ra Iger** n eth litehest Annual. M an C2ntiel feratima Noneoutine $

Medium of Pathway Total Numiber of "Mean (G "Mean (0 Heported

& Detection " Mean 10 Name Measure nents" H Sampled of Analysis Ihtarwe arul Directions " Range ** Ha nge g (i.LDI "Hange r= (Unit of Measurement) Performed anati:v. Me.JitR y8 oM Shoreline Soll Gamma (3) to 12(1/ lf 1211/11 0 H (pct /g 0.5 10(2/2) JRR 4.0 <niles W N pl dry weiglitj K 40 --

(9.6 10) y}

DC O.6 miles Wi> W 0.72(I/3) -(0/ II O

o Co-60 0.72(I/2) .

NA -(0/11 0 Cs 137 0.06 -(0/2) NA d

m 0 o DC 0.6 mtles WNW 2.l(2/ 21 1.61I/ ll N Ha-226 0.5 2. I(2/2) (l.5-2.al -

fa Th-228 0.04 (l.5-2.81

1. l(2/2) JHH 4.0 males W l.411/ II I.4( t /11 0 g

(0,88 1.3) o 3

0

~E E

O

>0 N

c

Nosuntial inwcr I ssista e4 Ikica tion (ll.D) Fradoes of deters, tile encasurements at spetshed L..etknas is seuluated in p s.nshemes til

Mean drul range based upuso deles talate encesuresnesats ordy.

1jf I i ! I

+c$0eS o m4_ ?eCO*

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n m 0 2 0 O l 2 O l 0 p 0 A n s M 5 A s t A do n a R N t o s T i r n i t

t G S e e c W W W W W W W W W W n e

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I

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=r ENVIROF"c4rAL RADIOIDGN'Al MONTIORING PHOGRAM

SUMMARY

gg :)

oe . "'

Nanne of Factiety Wolf Creek Niaclear Docket No SlN 50 482

$g* i o#

tocauon of Facility CoRev C~=a*v "-- Heporung Perhi An 81991 Q$ icounty. Statel rn y

g e fN> -

N- ' - of E ko Arts))mes and La IJaa81 Total Nuamber ' of All Isulicator is.sh- Imcatann with ihmMt . Asuusal. M .An fanimi IAT.ittuna Norirouune @-

Medium of Pathway ' **Mean (G "Meau 14 Heported c) g o Sainpled of Analysis Detecuan ** Mean (4 Nasne

- Hange Measureme nt s**

88 f fh - **!!a nge Destance and Direcuons **Hange gQ (lingt of Measurement) Performied WW-15

O

.ON O 0.5 -(0/ 121 NA NA -(0/12)

Water I 131 (24) u8

$ h Drtaking 0 2 7.7(12/12) BWIS 3.9 miles SW ' 8.0112/12) 8.O(12/12) d@ (IC1/4 Grose (241

'(6.0-12) {3.9-123 (3.9-125 gj Beta sci NA NA -(0 / 1 23 0 o Gamma (24) a -(0/121 NA -(0/4) O Trtuum (8) 1000 -(0/41 NA H

O, B-12 NA NA -(C/4) 0 Water. I-131 (161 0.5 -(0/12)

a: Grousul --

0 (pCI/11 g Gamma (16)

B-12 Sill /41 51(1/4) 0 K-40 100 -(0/12) .. ..

-10/ 12) NA NA -(0/4) O Trttaura (16) 1000 t*

,B 4 na b

N00

>0

P4orsetsaal tenwer 1.assite ed I)clea t6ust (1J3))

Mcast dsul sostge ladzed upuss detectal>$c ancesurements utdy. Frat tiorn ci detectatste measurements et sgmilted fem athsets is landkated fra gaascs shewrs (!)

,! llll

>+c&on7Eo:y r 3 s gO mw eNe00e*

t o

n f e e 0 on m 1 r ude er w s

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n uoe c r NNRM a a

p s e n t s

o it0 d a( e c e 3 )

ta o n *s 2 2 k l as i 1 1 i ea / - / m rMR =

l - a o 0

(

0

(

t s

t*

g* "

a = - -

s s

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)

0 k u

I n 30 ta Y 9 a 0( 1 0 R 9 e ) /0 m.

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6 4 4 0 i s

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4 n

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4 n S -

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s O o Y h e e R .N I

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G e i ts ht l s se u k u e s N c o p

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l i

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F r

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)

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f o t m f

( 20 t L l C ta i ) /0 a o ne O

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r o ag ta en 8

2

/

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(

0 h

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i H (

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s nia f f c l A c n o a u u e F t a

c mf i u

p O a o m no t n

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t r t) us V a ef v2 r.

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E I m

lo D 0 I a 1 ( t r a t e ) )

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nmtsd a d 4 4 a e ( 0 (

icsn Nutym a4 dro nK s

m u kru 4

nf Ar m k

i d a t r ad e e TdP G T t

im a

v m

)

l.e le n 8 e

y e rg aw e m ci w

n a s

s r a ht a a

ll u

$ s l a a a Pee da t s

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l a f a o pM an

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mfmao nl ) 'M iuS t r

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^g q O HGO cyH n o= $,E.5>

' l 11,l 1l ,lii

7, _. -.. .- .

v,

)

.. Attachment':to:ET 92-0098 l

Appendix B' Individual Sample Results

, t Y

.m..

a J.

s 1991 ANNUAL EADIOLOGICAL ENVIR0l# ENTAL OPEllATING REPORT PAGE 1 0F 71 WLF CREEE GENERATIKG STATION APPEttDIX E

- . . _ - _. _____1_________________

r Jhtiachmentut0ET92-0098~

x-

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02/19- 03/19 03/19 04/16 05/21 BE-7 LT.3. E 01 - LT.3. E 01 LT. 3. E 01 LT.4. ' E 01 LT. 4.- : E 01 M

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I E CE-141 LT.9. E 00 f.T. 7. E 00 LT. 1. E 01 LT. 9. E: 00 LT. 8. E 00

! CE-144 LT. 3. E 01 LT. 2. - E 01 LT. 3. E 01 LT. 3. E 01 LT. 3. E 01 -

RA.226 .LT.8 E 01 LT.7. E 01 LT. 9. E 01 LT. 9. E 01 LT. 7. E 01

,, Til-228 L'a; 7. .E,00 LT. 6. E 00 LT.8. E 00 LT. 8. E 00 LT. 6. E 00

e b

" TRrI1UM ANALYSIS:

n 11 3 7.5 1 0.7 E 03 8.910.7 ' E 03 8.5 i O.5 E 03 7.7 1 0.6 E 03 8.5 2 0.6 E 03 O

u 1

a -

w gg~ 'WOtX Cmr NUCLEAR OPERATING CORPORATION EXPOSURE PA111WAY - WA'IERBORNE

go -

t* e mv .m.

SUHFACE WATER - --4 p

(PCI/Ll'IER) 0 STATION NUMBER SP h E

lbu DATE COLLECTED: 11/19 12/17 H CAMMA SPEt'.T. RUM ANALYSIS:

N E 01 L T. 1. E 01 BE.7 LT 3.

K-40 LT. 1. E 02 LT.2. E 01

" L1N.54 LT. 4. E 00 LT. 1. E 00 CO-58 LT. 4. E 00 - LT. L E 00 i

b FE.59 CO-60 ZN-65 LT. 8. -

LT. 4.

LT. 8.

E 00 E 00 E 00 LT. 3.'

LT. 1.

LT.2.

E 00 E 00 E 00 0 Nil-95/ZR 95 - LT. 4. E 00 LT. 2. - E 00 HU.103 LT.4. E 00 LT. 2. E 00 e RU.106 LT.3. E 01 LT. 1. E DI I.131 LT.6. E 00 LT.2. E 01 CS- 134 LT. 4. E 00 LT. 1. E 00 CS- 137 LT. 4. E 00 LT. 1. E 00

,C LA-140/llA 140 LT. S. E 00 LT. 9. E 00

- CE- 14 I LT. 6. . E 00 - LT. 3. E 00 [

CE.144 LT. 2. E 01 L T. 6.- E 00 ;

RA.226 LT. 8. - E 01 L T. 2. E 01 m Til.228 LT.7. E 00 LT.2. E 00 g

m ,b E TRil1UM ANALYSIS:

ts o 11-3 7.4 s 0.7 E 03 6.6 1 0.5 E 03 [

m y !

s

,.y-

,}

"= c+

n ..

~

g g

r+

g y WO".F Curr NUCLEAR OPERATING CORPORATM11 EXPOSURE PATHWAY - WA1ERBORNE. c+.

ra e O

% P.*

SURFACE WNIER rn to d (PCl/ LITER) - ,

P.

'O STA110N NUMBER MUSIl . h.

s lE. o" _

^ DATE Coll.ECIED. 01/15 02/19 03/19 04/16 05/21 N GAMMA SPECIRUM ANALYSIS:

. $ h. ' LT. 3. E 01 - LT. 3. ' E 01 ' LT. 3. E 01 LT. 4. E 01 LT. 5. " On

$ HE.7 H K-40 LT. 5. E 01 LT. 5. E 01 ' LT. 5. E 01 - LT. 1. E 02 LT. 1. E O2 .

MN.54 LT.3. E 00 ' L'I. 3. ~ E 00 LT. 3. E 00 LT.4. E 00 LT. 4. . E 00 l

Q CO 58 LT. 3. E 00 LT.3. E 00 LT.3, E 00 LT.4. E 00 LT. 5. E 00 .

FE.59 LT. 7. E 00 LT.7. E 00 LT.7. E 00 LT. 1. E 01 LT. 1. E 01

, CO 60 LT. 3. E 00 LT.4. E 00 LT.4. E 00 LT.4. E 00 LT. 4.' E 00

~b ZN 65 LT.7. E 00 ' LT. 6. E 00 LT.7. E 00 LT.9. E 00 L T. 1. E 01 O Nil 95/ZR 95 - LT. 3. ' E 00 LT. 3. E 00 LT.4. E 00 LT. 5. E 00 ' LT. 5. E 00 RU 103 LT. ' 4. E 00 LT. 4. E 00.. LT. 4. E 00 L T. 5.- - E 00 LT.6. E 00 RU- 106 LT.3. E 01 LT.3 E 01 - LT. 3. ' E 01 LT. 4. E 01 LT.4. E 01

' 'II 9131 Js.134 LT. 8.

LT. 3. '

LT.4.

E 00 -

E 00 E 00 LT. 1.

1 LT. 3.

LT. 4.

E 01 E 00

. E 00 LT. 1.

LT. 3.

12 4.

E 01 E 00 E 00 LT.2.

LT. 5.

LT. 5.-

E 01 E 00 E 00 LT.2.

LT. 5.

L T. 5.-

E OI-E 00 E 00 CS- 137 0 IA.140/BA- 140 . LT. 7. E 00 . .T. 6. ' E 00 LT.7. E 00 LT.9. E 00 LT. 1. E 01 CE-141 LT. 8. E 00 - LT. 8. ! E 00 LT.7. E 00 LT. 1. E 01. LT. 1. E 01 -

( I.144 - LT. 3. E 01 LT. 3. E 01 ' LT. 2. E 01 LT.4. E 01 LT.3. E 01 RA.226 LT. 8.. E 01 LT. 8. E 01 LT. 7. ~ E 01 LT. 1. E 02 LT.9. E 01 LT.7. E 00 ' LT.7. E 00 LT. 7. E 00 LT. 9. E 00 LT.8. E 00 gm Tii.228 m5 TRrilUM ANALYSIS:

m go 11 3 - LT. 8. E O2 LT. 5. E 02 LT. I. E 03 LT. 9. E O2 LT. 5. E O2 :+

m 1

4

['

2 ,an.a %<o R g y u .

8E 1 1 0 0 000 0 01 0 0 000 1 1 0 2 00000 0 000000 0000 0 0 0 EEEEEEEEEEEEEEEEEE E 5

1 3

8. 33737 3 33 83 366276 6.

/

0 T. T. T. T T. T. T. T. T. T.T. T. T. T T. T. T T. T.

1 LLLLLLLLLLLLLLLLLL L 2' 0 1 2 0 0 0 0 0 001 1 001 1 2 000000 000 0 0 'L 0 0 0000 0 EEEEEEEEEEEEEEEEEE E 7

1 4 24 4 94 95 54 . . 15 571 4. 1 9 9.

/

9 T. T. T. T. T. T. T. T. T. T T. T.T. T.T. T. T. T. T.

0 LLLLLLLLLLLLLLLLLL L

.N O 1 1 0 0 1 0 000 1 1 0 01 01 1 1 2

.I' 0 0 0000 0 0 0 00 0 000 0 0G 0 T

A EEEEEEEEEEEEEEEEEE E RE ON PR . . . . . . . . . . . . .

RO 0 2

4 8 4 4 1 5 95 6. 4 . 25 . .5 .1 . 9391 5 OD

/

CK S 8 T. T. T. T. T. T. T T. T. T. T. T. T. T. T. T. T. T. T. _

. GE U 0 LLLLLLLLLLLLLLLLLL L _

N1 R IA M

.. ATW E )

R R 1

A EY W TE B R-I E

M 00 0 00 0 01 0 0 0 0 2 PA E L 1 1 0 000 00 0000G0000 000 1 1 1 1 0

OW C / U N RH AF C I

EEEEEEEEEEEEEEEEEE E _

AI 2N 1 P UR P N

(

0 1 . .

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1 35 . .. .337 . . 3. 734 . . . 32331. . .L. 3 76. 9 NU T /

T. T. T. T. T. T. T. T. T. T. T. T. T. T. T T. T. T.

T.

S 7 L

. KS EO 0 LLLLLLLLLLLLLLLLLL a

.EI . RX

-CE u m 1 1 00 0 0 0 0 0 1 1 6 0 001 1 0 2 O 0 0 000 0 0000000 0 0 000 0

. w "- EEEEEEEEEEEEEEEEEE E 8 35 337 3 63 4 21 3378 37 6 9 1

/

6 T. T. T. T. T T. T. T T T T. -T. T. T. T. T. T. T. T.

L 0 LLLLLLLLLLL LLLLLLL S

I S

Y L

A N

A :

M S I

u. U S t 4 1 Y a

r 1 0 L 5 4 A n_ C E P

9 1

N A

1 R

A 8 S B O Z / M C AM 4 / 3 6 4 7 0 1 44 26 28 U 8 9 05 5 0 0 3 3 41 4 E

T M 7 0 5 5 5 6 6 91 . 3 1 1 1

1 1 1 2- 2 1 1

1 3 A A D G E Kl4 CFCZNH 1

1 I- NOEONliUU1 HI CC1 CCRT -

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t i

e l *r H $o dN m " : g% H r

g ol n e HO g *

m

. , ; <;' f' i! ;

y a:

e- 1 WOIX CREEK' NUCI2AR OPERATHIG CORPORADON

- g $. EXPOSURE PKIMWAY a WATERDORNE ,.

H . O.

SURFACE WA'IUP. ,n

-e

' (PCI/ LITER) . o_

N

..- STA110N NUMBER MUSil: 6_

E, ,

l DATE COLLECIED: 'II/19 .12/17 il CH ~ GAMMA SPECTRUM ANALYSIS:

'N E 00 g

DE-7 LT.4. E 01. LT. 9.

MN54 T E 00 ' T ,. 01 CO-58 LT.4. - E 00 LT. ~ 1. E 00 .-

FE LT. 1. E 01 LT. : 3. ' E 00 CO 60 LT. 5. E 00 LT. 1. E 00 7.N-65 LT.9. . E 00 - LT.2. E 00 o Nil 95/ZH 95 LT.5. E 00 ~ LT. ' !. E 00 HU- 103 LT. 5. E 00 LT. 1. E 00

$ HU-lO6 LT.4. E 01 LT. 7. - E 00 I-131 LT. 8.' E 00 LT.,1. E 01 CS-134 LT. 5. E 00 LT. G. E 01 CS-137 LT. 5. . ' E 00 LT 9. E-01 o LA-140/ IIA-140 s ' LT. 7. E 00 LT. 7. E 00 i O CE.141 LT. 1. E 01 L L 2. E 00 CE- 144 LT. 4. E 01 LT. ' 4. E 00 RA-226 . LT. ' l. E 02 LT. I. E 01 Til-228 LT. 9. ' E 00 LT. 1. E 00 gm m$

TRI11UM ANALYSIS:

j n

,o 11 3 LT.9. . E 02 LT. 6. E 02 l

L M

't "

t -

A "c._--<- _ _ _ v _ .a _c--us

,_ --,,e --.

w -

_ - , - _ -3 V1 ,

+d m & ;%;

.M

. T:

8~

_ ~

g H. . WOEF cm NUCWAR OPERA 7 BIG COItPORd110N o I EXIOSURE PA1MWAY - WA1ERDORNE :

H SUHFACE WA1ER e~

to WCI/ LITER) 4.

a STAT 10N NUMBER SPAL ' $-

I-U N

~ DA1ECOLLECTED

. GAMMA SPECTRUM ANALYSIS:

02/13 03/19 04/16 g HE-7 LT.6. ' E 01 LT.4. E 01 LT. 3. E 01 H K-4 0 LT.2. E 02 LT. 6. E 01 LT. 5. E 01 MN.54 LT.6. E 00 LT. 3. - E 00 LT.3. E 00 CO 58 LT.6. E 00 LT.4. E 00 LT.4. E 00 FE.59 LT. 1. E 01 LT. 7. E 00 - LT.8. E 00 CO 60 LT.7. E 00 LT. 4. E 00 LT.4. E 00 b ZN-65 LT. 3. ' E 01 LT.7. E 00 LT.7. E 00 0 N1195/ZR-95 LT. 6. E 00 L f. 4. E 00 LT.4. E 00 HU 103 LT. 7. E 00 1.T. 5. E 00 LT.4. E 00 g HU- 106 LT. 5. E 01 LT. 3. E 01 LT. 3. E 01

$ 1 131 LT. 2.' E 01 LT. 1. E 01 LT. I. E 01 U LT.6. E 00 ' LT. 3. E 00 LT.4. E 00 CS- 134 CS- 137 LT.7. E 00 LT.4. E 00 LT.4. E 00 o IA-140/BA-140 LT. l. E 61 LT.8. E 00 LT. 1. E 01 N CE-141 L' I- E 08 LT. 8. E 00 LT. 7. E 00 CE- 144 LT. 4. E 01 LT.3. E 01 LT. 2. E 01 RA.226 L T. l.- E 02 LT. 8. E 01 LT. 7. E 01 (15-228 LT. I. E 01 LT.7. E 00 LT.6. E 00 TRrI1UM ANALYSIS:

an 11-3 6.3 1 0.5 E 03 7.420.7 E 03 6.6 i O.6 E 03

,o y *Duphmte Arulysis v

., ~ ~; .c: . --

-=-----; - - - -

$ "?AttQchment to ET 92-00986-

.l l

+ 5: -._

,p

- APPENDIX C Discussion of TLD Shielding Changes I

4 4

e ;

d.

1

.,5

-1991: AMhUAL RADIOLOGICAL ENVIROINENTAL OPERATIhG REPORT PAGE 1 0F 10 WOLF.' CREEK GENERATIEG STATION APPERE11 C

Attachment to ET 92-0098 During 1990, it was detennined that WCNOC had been using an improper thickness of shielding material with environmental TLDs. The WCGS program includes a requirement that environmental thennoluminescent dosimeters will conform to the detection capabilities set forth in Regulatory Guide 4.13 Revision 1. July 1977, ' Performance, Testing, and Procedural Specifications for Thermoluminescent Dosimetry: Environmental Applications' and ANSI N545-1975, ' Performance. Testing, and Procedural Specifications for Thermoluminescent Dosimetry (environmental applications)'. Vendor documentation indicates that the proper copper shield thickness to meet the recommendations of Regulatory Guide 4.13 and ANSI N545-1975 to is 0.093 inches (0.093'). Contrary to this requirement. 0.022 inch thick (0.022")

shields were in use at WCGS prior to the discovery of the discrepancy in 1990. The 0.022' shields were purchased prior to the issuance of the WCGS Technical Specifications and were in use since 1981. It was determined that discrepancy of shield thickness constituted a program deviation since the TLDs did not fully meet the recommendations of Regulatory Guide 4.13.

several corrective actions were taken.

The deviation was reported as required in the 1990 Annual Radiological Environmental Operating Repc:t.

Subsequent discussions with the vendor v--* initiated to determine the impact of using the 0.022" copper shiel It was decennined that the 0.022" shields would cause a conservati,4 over response of up to 250Z, depending on the energy of the incident gamma rays. The vendor determined that TLDs shielded by either 0.022' or 0.093" shields would respond the same to normal cosmic and terrestrial background radiation. WCGS TLD results were compared to Kansas Department of Health and Environment and NRC results over the same time period. WCGS results indicated normal background levels.

New TLD cases utiliuing 0.093* shields were acquirod and placed in the field in the fourth quarter of 1990. For three quarters, a TLD shielded by 0.093" material and a TLD shielded by 0.022" material was placed at each sampling location to cetermine the actual impact on exposure readings. The data for the three quarters is shown in Table C-1. The data for the fourth quarter of 1990 and the first two quarters of 1991 is plotted in Figures C-1 through C-3.

All of the TLD cases with the 0.022 inch thick shielding material were removed from the field after three quarters of data were obtained to determine the impact of the improper shields.

Figures C-1 through C-3 illustrate the exposure data for each sample point for three consecutive quarters. Each figure shows an obvious trend. Most TLDs shielded with 0.022' copper recorded a sligbtly higher exposure than the TLDs shielded with 0.093' material. Figtre C-4 illustrates the variance or difference between the 0.093' and 0.022' shield exposure readings for the three quarter period. The total number of observations is equal to 43 stations times 3 quarters minus one set of missing TLDs for 128 observa-tions. The avercge difference for all of the stations for the three quarter period was -1.55 mR per standard 90 day quarter. The negative sign indicates that the 0.022' readings were biased high as the vendor had suggested and thus the historical data since 1981 is conservative.

4-1991 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT PAGE 2 0F 10 WOLF CR M GENERATING STATION APPENDLX C

Attachment ~to ETL92-0098=

TABLE C-1 TLD SHIELD THICKNESS =COMPARIS0N 0.093' AND 0.022'. THICK COPPER TLD'i TLD 2. VARIANCE VARIANCE 0.093- 0.022 TLD1 - TLD1 -

INCH INCH TLD2 TLD2 .

EXPOSURES EXPOSURES EXPRESSED EXPRESSED YEAR QTR- LOC mR/Std Qtr mR/Std Qtr mR/Std Qtr IN I 1990 4 1 16.40 16.69 -0.29 -1.791 t 1990-- 4- 2 15.44- 15.44 0.00 0.00I 1990 4 3. 15.16 16.14 -0.98 -6.452 1990 4 4 15.36 16.53 -1.17 -7.641

-1990 4 5 15.07 16.14 -1.08 -7.142 1990 4 6 113.79 15.46 -1.66 -12.062 1990 4 7 14.46 14.36 0.10 0.682 1990 4 8 17.10 16.91 0.20 1.14I

'1990 4 9 16.61 15.05 1.56 9.41% '

1990 .4 .10 16.42 16.03 0.39 2.38!

1990 4 18.27 18.86 -0.59 -3.21Z

'1990 4 -12 16.42- 17.30 -0.88 -5.36Z

1990 4 13 16.71 18.08 -1.37 -8.19I

1990 4 14 16.-32 17.59 -1.27 -7.782

-15.29I~

1990- 4 15- 15.36 17.71 -2.35 1990 4 16. 14.87 17.51 -2.64 -17.76%

1990 4 17. 15.07 17.02 -1.96 -12.992 1990 -4 18 16.63 18.78 -2.15 -12.941 1990. 4. '19 14.28 18.98 -4.70 -32.88I 1990 4 20 -15.75 18.20 -2.45 -15.532 1990 4 21 13.11. 16.24 -3.13 -23.882 1990 4 22. 14.38 16.92 -2.54 -17.69%

1990 4 23 14.69 15.77 -1.08 -7.33I-1990 4 24. 15.38 16.75 -1.37 -8.922

.1990 4 25 11.85 13.91 -2.06 -17.36Z 1990 4 26 13.71 15.87 -2.15 -15.712 1990~ 4 27 15.57 17.33 -1.76 -11.322 1990 4 28 .13.03 16.84 -3.82 -29.322 1990 4 29 13.22 14.69. -1.47 -11.11Z-1990 4 30 13.51 16.26 -2.74 -20.291

-1990 4 31 14.98 16.35 -1.37 -9.15I 1990 4 32 14.90 16.08 -1.18 -7.892 1990 4J 33 -15.96 18.90 -2.94 -18.40I 1990 4 34 14.87- 17.32 -2.45 -16.45I 1990 4 35 15.64 17.30 -1.66 -10.62I 1990 4 36 15.73 16.71 -0.98 -6.212 1990 4 37 15.23 17.96 -2.73- -17.95I

-1991 ANNUAL RADIOLOGICAL ENVIRGIBtENTAL OPERATING REPORT PAGE 3 0F 10 WOLF, CREEK GENERATING STATION APPENDII C

. . v. . -

~. , . -a . _ _ _ _ _ . ,

0 Attachment to ET;92 0098'~

~

1 s -

l TABLE C-1 (Cont'd)

TLD SHIELD THICKNESS COMPARISON 0.093'_AND 0.022'_ THICK COPPER TLD 1 TLD 2 VARIANCE VARIANCE-0.093 0.022 TLD1 - TLD1 -

INCH INCH TLD2 'TLD2 EXPOSlJAES EXPOSURES EXPRESSED EXPRESSED' YEAR QTR ~' LOC mR/Std Qtr- mR/Std Qtr mR/Std Qtr IN I 1990 4- 38 16.11 18,64 -2.54 -15.762-1990 4 39' 15.60 16.48 -0.88 -5.622 ;

=1990 4' 40 14.22 14.71 -0.49 -3.45 1990 4' 41 16.30 17.57 -1.27 -7.782 1990. 4 42- 11.13 11.23 -0.10 -0.88Z-1990 4- 43 -9.57 10.25 -0.68 -7.142 1991- 1 1 15.77 16.89 -1.13 -7.142.

1991.- : 1' 2 13.03 14.44 -1.41 -10.792 1991 1- 3' 16.69 15.75 0.94. 5.62%

1991- 1 4 15.-28 17.16 --1.88 -12.272

.1991' 1 5 14.53 14.63 -0.09 -0.65I ,

-_1991 _1 6 14.34 15.19 -0.84 -5.88%

1991 1- 7 14'.08- 15.02 -0.94 -6.672 1991 - l- 8 16.24 17.27 -1.03 -6.36%

1991- 1- -9' 13.61 14.83~ -1.22 -8.972

-1991 1 10 15.39 '17.46 -2.06 -13.412-1991 -1 11 17.34 18.09 -0.75- -4.32I 1991- 1: 12 15.37 16.50 -1.13 -7.32I

'1991 11. *13_ 15.94- 17.63' -1.69 -10.592 1991- 1 14 16.13 16.59 ' .47 O -2.91Z 1991- la 15 -' 112.92 16.20 -3.28 -25.36%

1991 1- -16' 1991 1 17- 12.83 16.20' -3.37- -26.282 1991 1 18 13.58 15.83 -2.25 -16.551

-1991 1 19 13.49 16.48 -3.00. -22.22Z 1991. :1 20 13.49 16.30 -2.81 -20.83%

.19911 ;1- '21 11.43 12.92 -1.50 -13.112 1991- 1- 13.11 15.64 --2.53 -19.29Z 1991- l' 23 13.78 17.81 ' -4~.03 -29.25Z-1991- ll- -;24 -13.13' 15.94- -2.81 -21.43%

.1991- 1 o25' 11.81- --13.03 -1.22 -10.32%.

1991 1 26~ 11.71 '14.14 -2.43 -20.80%

.1991- 1- =27 14.331 15.64 -1.31 -9.15I.

1991 1 :28 .11.43 13.86' -2.43 -21.312 1991 11' 29 110.77 13.20 -2.43 -22.611

-1991 AIGRic 'ADIOLOGICAL E NIR0lGGNTAL OPERATING REPORT PAGE 4 0F~10

-WOLF CREEK GENERATIEG STATION APPENDIX C 4 _

m_. .#

I Attachtnent~ to. ET- 92-0098---

TABLE C-1 (Cont'd)- +

TLD SHIELD THICKNESS COMPARISON 0.093* AND-0.022' THICK COPPER TLD 1 TLD 2 VARIANCE VARIANCE 0.093 0.022 TLD1 - TLD1 -

INCH INCH TLD2 TLD2

EXPOSURES EXPOSURES EXPRESSED EXPRESSED YEAR QTR LOC mR/StdQtr, mR/Std Qtr mR/Std Qtr. IN I 1991- =1 30 13.67 14.24 -0.56 -4.112-19911 1 31- =13.13 -15.37- -2.25 -17.14I

-1991 1. 32' .12.49 15.22 -2.72 -21.80!

-1991 .1- 33 14.64: 16.70 -2.06 -14.101

-1991 1- 34 13.78 -16.iB -3.00 -21.772-1991- l' 35 13.49 16.58 -3.09 -22.922

-1991-- 1 36 13.30 16.11 -2.81 --21.131

~

1991- 1. 37 12.47- 15.09 -2.63 -21.05I 1991 1: -38 14.34 17.44 -3.09 -21.572-1991 :1 39- 13.38 15.53 -2.15 -16.08I-1991 11 11.93 15.31 D-3.38 --28.352 1991 .1 - 41- 114.33 18.64 -4.31 -30.072 1991 1 42 8.89 11.32 -2,43 -27.37Z'

;1991 1: 43' .8.33 10.67- -2.34 -28.09I 1991 2 1 15.78 18.42 -2.65 -16.78I E1991 2 2 13.02 14.19 -1.16 -8.942 ,

1991 2 3 15.56 12.92- 2.65- 17.01I 1991 2" 4 14.19 15.14. -0.95- -6.721 -

1991 2 -5 .15.25- 14.51 'O.74 '4.862-1991 ;2' 6 12.81 14.61 -1;80 -14.05I 1991- '2 '7= 12.39 13.55 -1.16 -9.402

'1991 :2; ;14.51 16.09 -1.59 -10.95Z 1991 '2- 9 .13.34 13.55 -0.21. -1.59I

~

1991 2 10 14.93- !15.46 --0.53 -3.551

-1991 2 11- 15.05- 16.43 -1.38 -9.15I-

'1991. 2- 12. 13.78 14.63- -0.85 -6.152 1991 2 13' 15.37 15'69

. -0.32: -2.072 1991 -2 314 13.78 18.02 -4.24 -30.77I 1991- 2 13. 13.36 14.42 ~-1. 0 6 - -7.94I 1991 2 .16 14.10 15.16 -1.06 -7.52%

H 1991 2 -17L 12.71 15.14 -2.44 -19.17I 1991 -2 '18 23.82 17.89 5.93 24.89Z 1991 2 19 14.29 14.72_ -0.42 -2.96Z

' s-i 1991 2 -- 2 0 13.45 15.56 -2.12 -15.751.

1991 2 21- 12.28 12.60 -0.32- -2.59%

-1991-AInlUAL. RADIOLOGICAL ENVIRO N AL OPERATING REPORT PAGE 5 0F 10

. WOLF CREEK GRIERRATING STATIOR APPENDIX C

.~ . . ,_ ,.. ,

_ Attachment 10.ET!92-0098

, TABLE C-1 (Cont'd) ,

.TLD SHIELD THICKNESS COMPARISON 0.093*'AND 0.022' THICK COPPER TLD 1 TLD 2 VARIANCE VARIANCE-0.093 0.022 -TLD1 - TLD1 - i INCH -- INCH TLD2 TLD2 EXPOSURES EXPOSURES EXPRESSED EXPRESSED YEAR QTR LOC 'mR/Std Qtr mR/Std Qtr mR/Std Qtr IN I 1991 2 22 14.08 15.25 -1.16 -8.272

-1991 2 23- 113.63 14.68 - ' 06 -7.752 1991 2 24 14.07- 14.81 . -5.262 1991 2 25 10.79 12.16 . ;/ -12.752' 1991' 2 26 11.96 13.66 -1.69 -14.162

'1991 2 27 13.54 14.70 -1.16 - 8 . 5 91.-

t 1991. 2 28 12.37 13.96 -1.59 -12.82%

'1991- .2m 29- 12.07 12.28 -0.21 -1.751 19911 2 30- 13.45 13.87 -0.42 -3.15Z

- 1991-. . 2- 31 15.04 15.14 -0.11 -0.701 1991 2- 32 12.59- 13.75 -1.16 -9.242 15.23 15.97

~1991 2 33 -0.74 -4.862 1991- it 34 14.43 16.24 -1.80 -12.502

- 1991- - 2. 35- 14.61 15.46 -0.85 -5.80Z.

1991 2 .36 14.19 14.40 -0.21 -1.492 199L - 2 37 13.22 15.02 -1.80 -13.602 1991 2- 38 15.02 29.51 -14.49 -96.48%

-13.66 14.51 -6.201

~

1991 2 .39 -0.85'

1991- 2 40 11.75 13.45 -1.69 -14.412 1991- 2 41- 13.98 14.82- -0.85 -6.062 1991-.--

2 42 - 9. 01. 8.59 0.42 4.712 1991 2 .43 8.59 8.59 0.00 0.002 s .

4

a. m 1991 ANNUAL RADIOLOGICAL ENVIR0lOENTAL OPERATING REPORT PAGE 6 0F 10 if0LF.mm GENERATING STATION APPENDIZ C

. _ , - - , . _ .,, .. . _ . . . ~ . _ , - - - . - - . ~ .

I:-

o p

.n x

ir -

SHIELD THICKNESS COMPARISON %

GE w 4TH OTR 1990 -o 30 0- t

. g

28 - .

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26 -

N :-

Ph 24 - -

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s 22 -

3. ,.

4 20 - M' g .

3 S 18 -

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ML20095K633

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