ML19259C833

Addendum 5 to Applicants Environ Rept,Expanded U Oxide Fuel Plant

ML19259C833
Person / Time
Site:	Framatome ANP Richland
Issue date:	04/30/1979
From:	SIEMENS POWER CORP. (FORMERLY SIEMENS NUCLEAR POWER
To:
Shared Package
ML19259C828	List: ML19259C827 ML19259C831 ML19259C833
References
JN-14-ADD.-5, NUDOCS 7908150269
Download: ML19259C833 (24)

Text

(o. (J.Th - ac-JN 14 ADD.5 ADDENDUM 5 TO APP ICANTS ENYlRONMENTAL REPORT l

EXPANDED URANIUM 0XIDE FUEL PLANT; I

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f UNITED STATES NUCLEAR REGULATORY COMMISSION l

SPECIAL NUCLEAR MATERIALS LICENSE NO. SNM-1227 DOCKET NO. 70 1257

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JN-14 Add. 5 Issue Date: 05/29/79 ADDENDUM 5 TO APPLICANT'S ENVIRONMENTAL REPORT (EXPANDED URANIUM OXIDE FUEL PLANT)

UNITED STATES NUCLEAR REGULATORY COMMISSION SPECIAL NUCLEAR MATERIALS LICENSE NO. SNM-1227 DOCKET NO. 70-1257 APRIL 1979 E(ON NUCLEAR COMPANY,Inc.

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JN-14 Add. 5 TABLE OF CONTENTS Page No.

1.0 INTRODUCTION

I 1.1 Current Environment I

1.2 Current Corporate Information 1

1.3 Current Faci l i ti es.................

2 2.0 OBSERVED EFFECTS OF FACILITY OPERATION.

2 2.1 Liquid Effluent 2

2.2 Ai rborne Effl uents.................

4 E.2.1 Uranium Releases from Exhaust Air Stacks.

4 2.2.2 Fluoride Released from Exhaust Stacks 4

2.3 Environmental Measurements.

5 2.3.1 Fluoride Content of Vegetation Samples 5

2.3.2 Uranium Conter:t of Soil and Vegetation Samples...

5 2.2.3 Data Interpretation 6

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JN-14 Add. 5 TABLE OF FIGURES FIGURE NO.

Page No.

1 Land Use Within 5 Mile Radius of Exxon Nuclear Site.

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Land Use Within 50 Mile Radius of Exxon Nuclear Site.

8 3

Current Facilities 9

4 Concentration of Fluoride Measured from

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Test Well #2 Samples 10 5

Average Monthly Concentration of Total Nitrogen Measured from Test Well #2 Samples 11 6

Location of Environmental Sampling Stations and Test Wells 1%

7 U0 Building Exhaust Stacks....

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8 Uranium Released from UO Building Exhaust Stacks Per Ton of Throughput. 2 14 9

Fluoride Released from U0, Exhaust Stacks Per Ton of Uranium Throughput.

15 10 Environmental Sampling Station Locations 16 11 Fluoride on Sagebrush.

17 12 Micrograms Fluorine Per Gram Vegetation.

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JN-14 Add. 5

1.0 INTRODUCTION

The original Environmental Peport for the Exxon Nuclear Company Uranium 0xide Fuels Plant was issued in June 1970, with Addendum 1 in October 1971, Addendum 2 in October 1972, Addendum 3 in July 1974, and Addendum 4 in August 1977 to update information concerning the environment surrounding the Uranium 0xide Fuel Plant and the effect of the plant operation on this environment.

Releases to the environment were projected to the increased fuel production rate which would result from Phase III of the UO Plant expansion piogram in Addendum 4 2

Addendum 5 provides the measured results of operation of the UO2 plant as expandeo in Phase III to include two operating UF lines (2 ons 6

per day capacity).

1.1 Current Environment The plant site and the current land usage are shown in Figure 1.

The location of the plant site within the region is shown in Figure 2.

The prir-11 change from the original Environmental Report is in the increase in industrial density on the Port of Benton property, three corr.ercial nuclear power reactors and the Fast Flux Test Facility, all located on the Hanford site a few miles beyond the 300 Area.

This increase in industry has resulted in an increase in population to the Benton and Franklin counties of 25,000 from 1974 through 1978, bringing the population to 121,000 people at the end of 1978 for the bi-county area.

1.2 Current Corcorate Information Exxon Nuclear Company, Inc. is an affiliate of Exxon Enterprises, Inc.

which is a wholly-owned affiitate of Exxon Corporation.

Exxon Nuclear is responsible for the development of ',he Corporation's nuclear energy business. T::e Nuclear Fuels Department of Exxon Nuclear is responsible

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JN-14 Add. 5 for the design, development and manufacture of nuclear fuels.

The principal offices of Exxon Nuclear Company are at 777 - 106th Avenue, N.E., Bellevue, Washington 98004, with the Nuclear Fuels Department manufacturing and engineering facilities located at 2101 Horn Rapids Road, Richland, Washington 99352.

1.3 Current Facilities Exxon Nuclear applied for authorization to operate the expanded UO 2 Plant on August 5,1977.

That authorization was granted by the Nuclear Regulatory Commission in Amendment 12, dated December 20,1977, to License No. SNM-1227. The current facilities and additional support facilities anticipated are shown in Figure 3.

I 2.0 OBSERVED EFFECTS OF FACILITY OPERATION i

Releases to the environment and measurements of environmental impacts compiled during the past seven years of facility operation are dis-cussed below. A six-month period of operation with the expanded facility is included in this period.

2.1 Liouid Effluent All process chemical waste solutions (including radioactive materials) are collected in a separate sewer system and discharged to the Proc < '

Liquid Chemical Waste Storage Lagoon System.

No radioactive materia..

are discharged to the City of Richland sewer system.

The lagoons are lined with an impervious material to prevent the contents from migrat-ing into the ground water, and test wells drilled into the ground water around the lagoons (see Figure 6) to provide leak detection capability.

Operating experience with these lagoons indicates that minor seepage paths do occur which affect the chemical composition of the ground water in cle-proximity to the lagoons.

The lagoon leak action guide in Section 3.4.4 of Document No. XN-2 requires action to correct leaks

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JN-14 Add. 5 when a concentration of chemicals can be detected in wells that could affect offsite environment.

The concentration of fluoride and total nitrogen for test well #2 is plotted in Figures 4 and 5, respectively.

Test well #2 has shown the highest concentration of chemicals.

These elevated concentrations have resulted in implementation of an investi-gative and corrective action program to minimize their effects on the ground water even though they are still below the level of mandatory action.

This program includes:

A special highly sensitive measurement of the uranium content in e

test well #2 and two other wells.

Uranium concentrations ranging from 0.03 to 0.3 parts per billion were detected, which indicate that no significant quantity of uranium of lagoon origin is reaching the ground water.

e The two northern-most lagoons have becn emptied.

The liner of the north lagoon has been cleaned and repaired; the second lagoon has been cleaned and a double hyperlon liner installed with a leak-sensing system installed in a a sand layer between the liners. A program to upgrade the other lagoons to this type of liner has been approved. This will require the construction of a fourth lagoon to have the nocessary storage capacity to remove the other lagoons from service for liner replacement.

Inspection and repair of the pipes and tanks in the pathways leading to the lagoons have been completed, e

Three test wells have been addeu to improve the leak detection capability. A hydrology study was conducted to determine the direction of flow and velocity of the ground water.

The data obtained indicates a more general source of leaks rather than a single origin of the chemical contaminants.

Liquid chemical effluents routed to the lagoon system will increase proportionally to increased plant throughput. However, the concen-trations of chemicals in the ground water will be controlled primarily

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JN-14 Add. 5 by the program of upgrading the lagoon liners, along with improved leak cetection capability.

2.2 Airborne Effluents 2.2.1 Uranium Releases from Exhaust Air Stacks The exhaust stacks through which all gaseous effluents pass from the building are shown in Figure 7.

The particulate radioactive material is sampled after the final HEPA filters and prior to exha. st to the environment. The microcuries of uranium per ton of uranium throughput released from all UO building exhausts for the years 1971 through 2

1978 are shown in F;gure 8.

The sharp peak in December 1976 is attributed to an inadvertent release of UF6 gas to the process area.

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Engineered safety measures have been installed to prevent recurrence of major UF6 gas releases.

In terms of concentration, the 1976 annual

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average exhaust air concentration of uranium '. as 4x10-I pCi/ml, which is far below the plant action guide of 2x10-uCi/mi at the stacks.

The 1977 annual exhaust air concentration of t/aniun was 6 x 10-15 Ci/ml.

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The peak in August and September of 1978 was the result of startup of the UF expansion and the time required to define and engineer corrections 6

to remove water from the K-32 process exhaust for Line 2.

This has been completed and the situation has been satisfactorily corrected.

The 1978 annual average exhaust air concentration of uranium was 5.5 x 10-I4 uCi/nl.

2.2.2 Fluoride Released from Exhaust Stacks Fluoride is removed from the conversion process by the process offgas systems. These offgases are liquid scrubbed to remove tne fluoride from the air exhausted via the K-10 and K-32 exhaust system stacks. The measured fluoride releases, related to plant thrc;ghput",

are shown in Figure 9.

The data are somewhat scattered, but indicate

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Jff-14 Add. 5 a relatively constant historical relationship of fluoride releases to uranium throughput.

During 1976 the fluoride concentration in the K-10 stack averaged about 0.02 ppm, which is about a factor of 500 below the plant limit of 10 ppm. UF Line 1 was down for several months 6

starting in late May 1978.

UF Line 2 was put into production in May 6

1978 and the process offgas air treatment and sampling system failed to remove the water from the process offgas.

The result was penetration of the filter system and the water invalidated the sampling method during the interval between May and September.

The engineering cor-rections mentioned in Section 2.2.1 have satisfactorily resolved this pro bl em.

2.3 Environmental Measurements Vegetation samples from stations surrounding the plant site are col-6' lected monthly during the growing season.

The sample station locations

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These samples are analyzed to determine i

uranium and fluoride content.

i 2.3.1 Fluoride Content of Vegetation Samples i

The fluoride content of vegetation samples are shown in Figure 11 for those sample stations located downwind from the UO2 plant. All other stations show lower fluoride concentrations.

To better illustrate trends in the data, the results from station numbers l A,13, 5,11 and 12 are listed as a function of time in Figure 12.

The effect of the stack discharges are clearly seen on sample station #1, located onsite.

2.3.2 Uranium Content of Soil and Vegetation Samples The uranium content of soil and vegetation samples remain low and show no discernable trend with either time or plant throughput.

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JN-14 Add. 5 2.3.3 Data Interpretation The fluoride content of vegetation samples does not always correlate with the measurements of fluoride releases from the K-10 and K-32 stacks.

Similarly, there is no apparent relationship between the environmental concentrations of uranium' and fluoride.

The environ-mental concentrations of uranium, while remaining low and scattered, tend to correlate with the uranium releases shown in Figure 8.

Our investigation of this anomaly indicates that the releases of fluoride and uranium probably occur by different mechanisms. Both materials are apparently released from the plant exhaust stacks.

However, the peaks in fluoride content of vegetation samples roughly correlate historically with periods when difficulty has been experienced with equipment which handles and contains UF6 gas. When these problems l

result in releasing small quantities of UF6 gas to the rooms, the hydrogen fluoride formed by hydrolyzation is swept out with exhausted room air, thus bypassing the scrubbers in the process offgas systems.

The difficulty has been resolved with de ign changes, and such releases are no longer anticipated.

The downturn of fluoride content of vege-tation samples in late 1978 continues to support this conclusion.

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JN-14 Add. 5 FIGURE 12 Micrograms Fluorine Fer Gram Vegetation Station Number Date lA 1B 5

11 12 08/71 10.5 14.4 29.5 17.5 10.5 09/71 6.5 6.0 10/71 21.0 14.5 10.5 12/71 22.8 20.0 16.8 30.0 01/72 27.5 27.6 02/72 10.2 11.9 03/72 22.1 5.1 6.8 14.0 04/72 29.6 16.2 05/72 20.8 27.3 06/72 19.4 19.5 16.4 12.7 07/72 50.0 57.4 08/72 20.4 20.9 09/72 13.5 13.5 14.3 14.7 10/72 29.2 46.0 11/72 14.0 21.0 12/72 27.6 33.3 41.2 47.5 04/73 13.0 12.7 8.6 19.1 05/73 38.5 16.0 06/73 13.9 07/73 12.1 17.3 7.9 11.4 08/73 l'6.5 16.0 09/73

5.. l 20.8 10/73 32.1 45.1 46.1 30.3 03/74 3.0 2.0 5.0 2.0 05/74 0.7 0.3 0.3 06/74 3.0 7.0 2.0 07/74 10.5 7.5 2.5 2.5 10.P 08/74 4.0 4.0 4.0 09/74 4.8 6.8 4.4 10/74 7.2 S.8 3.2 5.6 7.2 11/74 1.0 1.0 1.0 12/74 5.2 6.0 05/75 4.0 2.3 1.0 06/75 9.2 3.2 21.0 07/75 3.8 2.0 08/75 16.0 2.5 0.6 1.9 3.9 09/75 8.3 4.4 3.8 10/75 11.0 0.6 1.5 11/75 6.6 2.4 7.0 6.8 4.0 12/75 29.3 14.0 23.0-

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JN-14 Add. 5 FIGURE 12 (Cont.)

Micrograms Fluorine Per Gram Vegetation Station Number Date lA IB 5

11 12 03/76 20.6 9.6 10.8 24.4 8.8 04/76 13.8 5.3 8.5 05/76 4.6 4.1 7.8 06/76 64.6 37.7 48.9 07/76 62.0 38.9 37.4 24.4 11.6 08/76 9.0 8.4 2.1 09/76 20.8 49.0 24.6 10/76 3.8 3.8 2.2 8.8 2.2 11.'75 26.0 18.0 12/76 35.0 22.0 19.0 03/77 75.9 40.0 45.8 37.6 29.7

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04/77 43.2 39.7 53.6 05/77 101.2 108.9 21.5 06/77 12.5 1.3 11.9 38.7 35.3 07/77 35.9 27.2 t

08/77 26.7 09/77 34.4 21.5 23.8 23.4 27.8 10/77 36.2 33.9 72.6 13.8 11/77 8.0 5.0 25.6 12/77 74.0 16.0 22.7 33.3 15.9 03/78 17.9 4.7 38.5 52.5 20.6 04/78 46.7 33.3 34.0 05/78 57.6 19.8 06/78 151.4 565.8 85.0 189.9 191.4 07/78 477.1 282.6 715.9 08/78 8.0 73.1 21.5 09/78 14.3 4.7 13.9 1.6 8.1 10/78 6.3 3.2 15.4 11/78 26.2 13.5 5.3

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JN-14 Add. 5 Issue Date: 05/29/79 ADDENDUM S i

TO APPLICANT'S ENVIRONMENTAL REPORT EXPANDED URANIUM 0XICE FUEL PLANT Distribution Copy No.

Holder 1-7 W. T. Crow - USNRC l

8 W. T. England 9

R. Nilson 10 P. J. O'Neil 11 R. K. Robinson 12 R. H. Schutt 13 M. R. Schwab 14 M. L. Smith 15 W. E. Stavig 16 R. B. Stephenson 17 H. P. Estey 18 W. L. Hampson 19 Document Control Library 20 W. S. Nechodom 21 - 29 Document Control (Extras)

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