ML20204H677

Rev 1 to Procedure RDW 3.8, Procedure to Determine Radwaste Classification

ML20204H677
Person / Time
Site:	Point Beach
Issue date:	05/11/1984
From:	WISCONSIN ELECTRIC POWER CO.
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References
RDW-3.8, NUDOCS 8411120350
Download: ML20204H677 (3)

Text

s RDW 3.8 e

MINOR Revision 1 05-11-84 PROCEDURE TO DETERMINE RADIOACTIVE WASTE CLASSIFICATION  !

1.0 GENERAL Radioactive waste sent to the burial sites must meet the classification and physical form requirements specified in 10 CFR 61. The waste will fall into one of three classes, Class "A," Class "B" or Class "C." Classification is based on the concentration of certain nuclides in the waste. In addition, depending upon which class the waste falls into, the physical form of the waste must be able to withstand certain tests specified by the NRC. This procedure outlines the steps necessary to determine in which waste class individual packages of waste will be classified.

2.0 REFERENCES

2.1 10 CFR 61 2.2 NRC Low-Level Waste Licensing Branch Technical Position oa Radioactive Waste Classification, dated May, 1983 2.3 NRC Technical Position on Waste Forin, dated May 1983

. 2.4 State of South Carolina Radioactive Materials License No. 097, issued

-to Chen Nuclear, expiration date December 31, 1984.

2.5 State of Washington Radioactive Materials License No. WN-IO19-2, issued to U.S. Ecology, expiration date November 30, 1985.

3.0 WASTE CLASSIFICATION (10 CFR 61.55) 3.1 Considerations for wastes containing nuclides listed in the attachment.

Determination of the classification of radioactive waste involves two considerations.

3.1.1 Long-lived isotopes Consideration must be given to the concentration of long-lived radionuclides (and their shorter-lived precursors) whose potential hazard will persist long after precautions such as institutional controls, improved waste form, and deeper disposal have ceased to be effective.

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( Page 2 3.1.2 Shorter-lived isotopes consideration must also be given to the concentration of shorter-lived radionuclides for which the requirements on institutional controls, waste form and disposal methods are effective.

3.2 If the radioactive waste contains a nuclide which is not listed in the attachment, then that nuclide does not need to be considered when determining the waste class.

If the waste does not contain any of the nuclides listed in the attachment, then the waste is classified as Class "A."

3.3 Sum of Fractions Rule for Mixtures of Radionuclides For determining classification for waste that contains a mixture of radionuclides, it is necessary to determine the sum of fractions as follows.

3.3.1 Divide each nuclide's concentration by its appropriate limit in the attachment and add the resulting values. The appropriate limits must all be taken from the same column when doing this calculation.

, 3.3.2 The sum of the fractions for the column must be less than 1.0 if the waste class is to be determined by that column.

EXAMPLE: A waste contains Sr-90 in a concentration of 50 pCi/cm3 and Cs-137 in a concentration of 22 pCi/cm3 . Since the concentration of both exceeds the values listed in Column 1, for Class "A" they must be compared to Column 2 values. For Sr-90 fraction, 50/150 = 0.33; for Cs-137 fraction, 22/44 = 0.5.

The sum of fractions is 0.33 + 0.5 = 0.83. Since the sum is less than 1.0, the waste is Class "B."

l 3.4 Radionuclide Distribution of Radioactive Waste File HP 2.12 contains the results from the chemical analysis to determine the radionuclides distribution of the various forms of radioactive waste.

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( Page 3 ATTACHMENT WASTE CLASSIFICATION TABLE RADIONUCLIDES CONCENTRATION LIMITS IN pCi/cm3 Group 1 (short-lived) Class A Class B Class C Total of all nuclides with half-life less than 5 years 5 700 >700

• H-3 5 40 > 40

• Co-60 5 700 >700

• Ni-63 5 3.5 5 70 $ 700 Ni-63 in activated metal 5 35 5700 5 7000 Sr-90 5 0.04 5150 5 7000 Cs-137 5 1 5 44 5 4600 Group 2 (long-lived)

C-14 5 0.8

• 5 8

( C-14 in activated metal 5 8

• 5 80 Ni-59 in activated metal 5 22

• 5 220 Nb-94 in activated metal 5 0.02

• 5 0.2 Tc-99 5 0.3

• 5 3 I-129 5 0.008

• 5 0.08 Limits Applicable Only To Waste Sent To Barnwell, SC CONCENTRATION LIMITS IN nCi/gm Alpha emitting transuranics with half-life greater than 5 years 5 10

• 5 100 Pu-241 5 350

• 5 350 cm-242 52000 * $20000 Limits Applicable Only To Waste Sent To Richland, WA CONCENTRATION LIMITS IN nCi/gm Transuranics 5 10 ** **

Ra-226 5 10 ** ** l O

There are no limits established for these radionuclides in Class "B" or "C" wastes. Practical considerations such as the effects of external radiation or internal heat generation on transportation, handling and disposal will limit the concentrations for these wastes.

C* Specific approval is required from U.S. Ecology for waste sent to Richland, WA with concentrations of transuranics or Ra-266 greater than 10  !

nanocuries/ gram. l

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