ML20043F415

Discusses Review Re Disposal of Radioactive Cooling Tower Sludge in Sludge Landfill of Palo Verde.Util Agrees W/ Arizona Radiation Regulatory Agency Conclusions

ML20043F415
Person / Time
Site:	Palo Verde
Issue date:	10/04/1989
From:	Bangart R NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS)
To:	Miller V NRC OFFICE OF GOVERNMENTAL & PUBLIC AFFAIRS (GPA)
References
REF-WM-3 NUDOCS 9006140513
Download: ML20043F415 (1)

Text

ES/ MEMO V. MILLER l

1 flEMORANDUM FOR:

Vandy L. Miller, Assistant Director for State Agreements Program q' ' -

4 g"o Division of State, Local and Indian Tribe Programs Office of Governmental and Public Affairs l

FROM:

Richard L. Bangart, Director

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Division of Low. Level Waste Management and Decommissioning, NMSS

SUBJECT:

TECHNICAL REVIEW ON PALO VERDE REACTOR SLUDGE PROBLEM My staff reviewed the conclusions of the Arizona Radiation Regulatory Agency (ARRA) concerning disposal of slightly radioactive cooling tower sludge in the

" Sludge Landfill" of the Palo Verde Nuclear Generating Station.

Based on the material provided by the licensee, Arizona Public Service Company, staff

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agrees with the ARRA conclusions.

Based on their review, they offer the I

following observations:

)

l 1.

Staff agrees that radionuclide concentrations are very low and that

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it is reasonable to allow the proposed action.

The average 1

concentrations of the key radionuclides ir. the sludge, Cs.137 and Co.60, are below 1 pCi/g, well below the Ad Hoc soil clean-up criteria of 15 pCi/g for Cs-137 and 8 pCi/g for Co-60 set by NRC.

We agree that no remedial action needs be taken on the existing disposal.

I 2.

For continued disposal of sludge in the landfill, the State should ensure that the residual concentrations of Cs-137 and Co-60 remain below the above clean-up criteria, with the unity rule applied if both radionuclides are present.

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3.

No total inventory was provided for the existing situation; and there is no information provided on the current use of groundwater l

in the vicinity of the landfill.

For continued disposal of the sludge at the landfill, the State should ensure that the total residual inventory of Cs.137 and Co-r ^ are below the levels specified in NUREG-1101, vol. 1, i.e below 100 micro.Ci for Cs-137 and Co.60 combined; otherwise

.he State may need to consider groundwatcr impacts based on site specific information.

staff at If you have any questions, please contact Dr. Edward Shum of RICHARD L. BA1RT 301-492-0607.

(SIGNED)d L. Bangart, Director Richar Division of Low-Level Waste Management

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