ML17331A990
| ML17331A990 | |
| Person / Time | |
|---|---|
| Site: | Cook  |
| Issue date: | 09/29/1993 |
| From: | Fitzpatrick E INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG |
| To: | Murley T NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM), Office of Nuclear Reactor Regulation |
| References | |
| AEP:NRC:1154C, NUDOCS 9310050226 | |
| Download: ML17331A990 (5) | |
Text
ACCELERATED DOCUMENT DISTRIBUTION SYSTEM REGULRT(Q INFORMRTZON DISTRIBUTION+STEM (RIDE)
ACCESSION NBR:9310050226 DOC.DATE: 93/09/29 NOTARIZED:
NO FACIi':50-,315 Donald C.
Cook Nuclear Power Plant, Unit 1, Indiana M
50>-3i6 Donald C.
Cook Nuclear Power Plant, Unit 2, Indiana M
AUTH.NAME AUTHOR AFFILIATION FITZPATRICK,E.
Indiana Michigan Power Co. (formerly Indiana
& Michigan Ele RECIP.NAME RECIPIENT AFFILIATION MURLEY,T.E.
Office of Nuclear Reactor Regulation, Director (Post 870411
SUBJECT:
Responds to question raised by member of staff relative to submittal AEP:NRC:1154,application for alternative disposal re turbine room sump absorption pond sludge.
DISTRIBUTION CODE:
BOOZD COPIES RECEIVED:LTR I
ENCL P SIZE:
TITLE: OR Submittal: General Distribution NOTES:
RECIPIENT ID CODE/NAME PD3-1 LA WETZEL,B COPIES LTTR ENCL 1
2 RECIPIENT ID CODE/NAME PD3-1 PD COPIES LTTR ENCL INTERNAL: NRR/DE/EELB NRR/DRCH/HICB NRR/DSSA/SRXB OC LF CB E
FILE 01 EXTERNAL: NRC PDR NRR/DORS/OTSB NRR/DSSA/SPLB NUDOCS-ABSTRACT OGC/HDS2 NSIC NOTE TO ALL"RIDS" RECIPIENTS:
'LEASE HELP US TO REDUCE iVASTE! CONTACT TPIE DOCUMENT CONTROL DESK, ROOM Pl-37 (EXT. 504-2065) TO ELIMINATEYOUR NAME FROM DISTRIBUTION LISTS FOR DOCUMENTS YOU DON'T NEED!
TOTAL NUMBER OF COPIES REQUIRED:
LTTR 15 ENCL
~f v
i1 E
lndlana Nlichigan Power Company P.O. Box 16631 Columbus, OH 43216 INEHANA NSCNlGAN PWM AEP:NRC:1154C Donald C.
Cook Nuclear Plant Units 1 and 2
Docket Nos.
50-315 and 50-316 License Nos
~ DPR-58 and DPR-74 APPLICATION FOR ALTERNATIVE DISPOSAL; TURBINE ROOM SUMP ABSORPTION POND SLUDGE; ADDITIONALINFORMATION U.S. Nuclear Regulatory Commission Document Control Desk Washington, D.C.
20555 ATTN:
T.
E. Murley September 29, 1993
Dear Dr. Murley:
This letter is in response to a question raised by a member of your staff relative to our submittal AEP:NRC:1154, Application for Alternative Disposal; Turbine Room Sump Absorption Pond Sludge.
The question posed is, "Why wasn't cesium 137 identified in the samples obtained from the application site in 1991 since it was identified in the 1982 sample."
The following factors 'explain the difference in sample results:
- First, the lower limit of detection (LLD) for radionuclides is affected by length of count time.
Sludge samples analyzed in 1982 were counted for 4000
- seconds, twice as long as the samples analyzed in 1991. It has been determined that we are capable of meeting the cesium environmental LLD for dry sediment by counting a one liter sample for 2000 seconds (the cesium 137 environmental LLD for dry sediment is 180 pCi/kg or 1.8E-7 uCi/g).
Cesium 137 activity below this value would not be identified.
- Second, cesium is not retained in a sandy soil environment and tends to migrate through, being assimilated by aquatic systems and plants.
The sludge that was dredged from the pond was a sand/soil mixture and the entire Donald C.
Cook Nuclear Plant site is proximate to sand dunes and is built on a sand/soil mixture (reference:
Radioecolo Nuclear Ener and the Environment, F.
Ward Whicker and Vincent Schulty, CRC Press, Inc., 1982).
0400PL
,93100 50226" 930929
'DR ADOCK" 05000315DR
3 Dr. T.
E. Murley AEP:NRC:1154C
- Finally, the samples analyzed in 1982 were obtained from the sludge mixture itself.
This sludge was spread over 4.7 acres and covered with soil.
Therefore, the samples obtained in 1991 were diluted by area spreading and noncontaminated soil.
Sincerely, Vice President eg CC:
A. A. Blind - Bridgman G. Charnoff J.
B. Martin - Region III J.
R. Padgett NFEM Section Chief NRC Resident Inspector
- Bridgman
a', Q'r