ML20126J215
| ML20126J215 | |
| Person / Time | |
|---|---|
| Site: | 07200001, 07001308 |
| Issue date: | 12/03/1992 |
| From: | Ellis J GENERAL ELECTRIC CO. |
| To: | Davis A NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| Shared Package | |
| ML20126J185 | List: |
| References | |
| NUDOCS 9301060079 | |
| Download: ML20126J215 (12) | |
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. GE Nuclear Encigy '
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"'M qt orm +i McacZ December 3, 1992 Rin 4 rnOlh-Mr. A. Bert Davis U.S. Nuclear Regulatory Commission Region III 799 Roosevelt Road Glen Ellyn, IL 60137
Subject:
Morris Operation Groundwater Monitoring Ref:
(1) NRC letter (Grobe to Ellis) 9/28/92 Attachments:
(1)
Water Analyses (2)
LAW Vault Leak Detection (3)
Fuel Storage Basin Leak Detection
Dear Mr. Davis:
This letter is intended to provide an update and requested amplifying information on three key points addressed in Ref (1):
(1)
Description of Existina Well Functional Canabilities:
Dames and Moore has been retained to study and make recommendations concerning MO wells, Specifically they will:
o Examine existing wells for physical condition, depth, and location, o
Determine adequ'acy of existing wells as monitoring points-in the event of a vault or basin leak detection system. failure.
o Use historical water depth data in existing wells and geologic data from previous site studies to construct a mathematical model that describes groundwater migration under the site, o
Draw conclusions from the model and.make recommendations for new wells (if any) in order to effectively detect a ' basin or vault leak.
Dames and Moore visited the site the week of November 16, 1992 to study existing wells and to take water depth measurements. A mathematical model is now being developed using this'information. 'We expect to be able to communicate with you again on this subject in early 1993.
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A. Bert Davis -NRC December 3, 1992 Page 2 (2)
Drinkino Water Analysis. Aquifer Performance:
It is not clear what concern is being addressed in the first part of paragraph 2 of Ref (1).
If the concern is whether basin or vault leakage from their respective leak detection systems could/would-be detected by drinking water analyses, the answer is yes.
If the concern-is whether M0 personnel are protected from ingesting water potentially contaminated by basin or vault leakage, the answer is still =yes.
Historical basin and vault leak detection data indicato no leakage to the environs from these sources has ever occurred.
If a leak did occur, we believe the presence and magnitude of a leak would be_ best characterized by radiocesium migration. Attachment (1) provides information on major vault, basin, and drinking water constituents.
(3)
Descrintion of Vault and Basin leak Detection Systems:
Contained in Attachments (2) and (3).
Sincerely, h1 @W
. E. Ellis Manager, Morris Operation JEE: tit
- cc:
L. L. Denio J. D. Kesman
-G.' R. France (NRC) a a,
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r WATER ANALYSES LAW Vault (I)
Basin (2) y,j j (3T (11/23/92)
(11/23/92)
(10/92)
Alpha N/A N/A
<7x10'7 pCi/ml(4)
Cs-137 1.2 pCi/ml 2x10'4pC1/ml
<4.4x10-6 pC1/ml(4)
H-3 N/A 1.6x10'4 pCi/ml
<lx10-6 pCi/ml(4) i C1' 100 ppm
<0.1 ppm N/A NO '
13,000 ppm
<0.8 ppm 1.1 ppm 3
pH 13.1 5.1 8.3 II)
LAW Vault sample analyzed quarterly.
(2)
Basin water analysis performed weekly.
(3)
Well water analysis for N0}y and pH performed monthly.
Radiochemical analysis performed quarter (4)
Lower limit of detection.
4
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ARRO Laboratory, Inc.
Est 1965 P.O. Box 686 Caton Farm Road Phone: 815 727-5436 Joliet, Illinois 60434 FAX 815-740 3238 Attention of:
MR. JOHN E. McGRATH P.O. Number 284-91L474X Company GENERAL ELECTRIC COMPAtrl Date Received 03/30/92 Address MORRIS OPER. 7555 E COLLINS RD Date Completed 05/20/92' City / State / Zip MORRIS,IL,60450 ARRO NO.
SAMPLE DESCRIPTION DATE 146830 JAhlTOR'S ROOM - MORRIS OPERATION 03/30/92 146831 TRAlhlkG CENTER - MEN'S R00*
03/30/92 ANALYSIS 146830 146831 LEAD (0.010
<0.010 NITRATE AS N 0.41 0.61 SULFIDE (AS S)
<0.02
<0.02 RADIUM 226 PCl/ LITER 1.1 1.3 M0lM 228 PC1/ LITER 2.
B.
F"'S ALFdA PCl/ LITER 4.2 5.6 t,
.J BETA PC1/ LITER 14.8 1T.2 VOC
. ATT ACHED
.ATTActFD RESULTS IN pos UNLESS OTHERd!SE INDICATED
's
- SEE ATTACMENT FOR COMENTS 1 CERTIFY ikAT ! AM FAMILIAR WITH THE INFORMATION CONTAINED IN THIS REPORT AND THAT TO THE BEST OF MY KNOWLEDGE AND BELIEF SUCH INFORMATION IS TRUE, COMPLETE AND ACCURATE.
APPROVED BY.,
W...
DATE :
05/20/92 Joan Rolih, Director Environmental Services 4
TESTING IS IN ACCORDANCE WITH PROCEDURES OUTLINED IN THE NEWEST E0!TIONS OF:
STANDARD METH005 FOR THE EXAMINATION OF WATER AND WASTEWATER AST), STANDARDS, PART 31, ' WATER, ATMOSPHERIC UIALYSIS' METHODS FOR CHEMICAL ANALYSIS OF WATER WASTES, EPA WATER QUALITY OFFICE
s x-ARRO:
- Imboratory, Inc.
.Lt.1965 P.O. Box 686-Caton Farm Road Phone: 815 727-5436 -
- Joliet, Illinois 60434 FAX 815 740-3238 VOLATILE ORGANIC COMPOUND (524.2)
OENERAL ELECTRIC COMPANY JANITOR'S ROOM - MORRIS OPERATION 146830 ALL RESULTS EXPRESSED IN PPB UNLESS OTHERWISE INDICATED.
REGULATED VOC'S BENZENE
<0.5 CARBON TETRACHLORIDE
<0.5 1,2 DICHLOR0 ETHANE
<0.5 1,1-DICHLORCETHENE
<0.5 1,1,1 TRICHLOROETHANE
<0.5 TRICHLOROETHENE
<0.5 VINYL CHLORIDE
<0.5 p-DICHLOROBENZENE
<0.5 AEGULATED VOC's 1,3-DICHLOROPROPANE
<1.0 BROM0 FORM
<1.0 STYRENE
<1.0 CHLOROBENZENE
<1.0 CHLOR 0 METHANE
<1.0 DIBROMOCHLOR0 METHANE
<0.5 BROM0 METHANE
<1.0 CHLOR 0 ETHANE
<1.0 BROM0 CHLOR 0 METHANE
<0.5 CHLOROFORM
<0.5 1,2,3-TRICHLOROPROPANE
<2.0
.BROMODICHLOROMETHANE
<0.5 1,2,3-TRICHLOROBENZENE
<3.0 DICHLORODIFLUOROMETHANE
<1.0 n-PROPYLBENZENE
<1.0 1,1-DICHLOROETHAllE
<0.5 1,1,1,2-TETRACHLOR0 ETHANE
<0.5 1,2-DICHLOROPROPANE
<0,5 TETRACHLOROETHENE
<0,5 ETHYL ~ BENZENE
<1.0 1,3 DICHLOROPROPENE
<1.0 1,1,2,2-TETRACHLOR0 ETHANE
-<1.0 2,2-DICHLOROPROPANE
<1.0 TOLUENE
<0.5 1,2,4-TRIMETHYLBENZENE
<2.0
-trcns-1,2-DICHLOROETHENE
<0.5 n-BUllLBENZENE
<1.0
'1,1,2-TRICHLOR0 ETHANE
<0.5 NAPHTHALENE
<2.0 TRICHLOROFLUOROMETHANE
<1.0 HEXACHLOR0BUTADIENE
<2.0 m-DICHLOROBENZENE
<1.0 o-CHLOR 0 TOLUENE
<1.0 1
METHYLENE CHLORIDE
<1.0 p-CHLOR 0 TOLUENE
<1.0 clo-1,2-DICHLOR0 ETHYLENE
<0.5 1,3,5-TRIMETHYLBENZENE
<2.0
- o-DICHLOROBENZENE
<1.0 p-ISOPROPYLTOLUENE
<1.0 11,2,4-TRICHLOROBENZENE
<2.0 1,1-DICHLOROPROPENE
<1.0
- DIBROM0 METHANE
<1.0 iso-PROPYLBENZENE-
<1.0 1,2-DIBROMCETHANE (EDD)
<0.1 tert-BUTYLBENZENE
<2.0 11,2-DIBROMO-3-CHLOR 0 PROPANE
<0.1 sec-BUTYLBENZENE
<2.0 p-XYLENE
<1.0 BROM0 BENZENE
<1.0 YLENE
<1.0 m-XYLENE
<1.0
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ARRO J
Laboratory, Inc.
I" #
P.O. Ikn 686 Caton Farrn Road Phone. 813 727-5436 joliet. Ilhnoin 60434 FAX 81$.740 3238 9 0 *. AT) S OROANIC COMPOUND (524.2)
GENERAL ELECTRIC COMPANY TRAINING CENTER - MEN'S ROOM 140031 ALL RESULTS EXPRESSED IN PPB UNLESS OTl!ERWISE INDICATED.
REGULATED VOC'S BENZENE
<0.5 CARBON TETRACHLORIDE
<0.5 1,2 DICHLOR0 ETHANE
<0.5 1,1-DICHLORCET!!ENE
<0.5 1,1,1 TRICHLOR0 ETHANE
<0.5 TRICHLOROETHENE
<0.5 VINYL CHLORIDE
<0.5 p-DICitLOR0 BENZENE
<0.5
.AEOULATED VOC'S 1,3-DICHLOR0 PROPANE
<1.0 BROM0 FORM
<1.0 STYRENE
<1.0 Cl!LOROBENZENE
<1.0 CHLOR 0 METHANE
<1.0 DIBROMOCHLOROMETHANE
<0.5 BROM0 METHANE
<1.0 CHLOR 0 ETHANE
<1.O BROMOCHLOROMETHANE
<0.5 CHLOROFORM
<0.5 1,2,3-TRICHLOROPROPANE
<2.0 BROMODICHLOROMETl!ANE
<0.5 1,2,3-TRICHLOROBENZENE
<3.0 DICHLORODIFLUOR0 METHANE
<1.0 n-PROPYLBENZENE
<1.0 1,1-DICHLOR0 ETHANE
<0.5 1,1,1,2-TETRACHLOR0 ETHANE
<0.5 1,2-DICHLOROPROPANE
<0.5 TETRACHLOROETHENE
<0.5 ETHYL BENZENE
<1.0 1,3 DICHLOROPROPENE
<1.0 1,1,2,2-TETRACHLOR0 ETHANE
<1.0 2,2-DICH. R0 PROPANE
<1.0 TOLUENE
<0.5 1,2,4-TRIMETHYLBENZENE
<2.0 trana-1,2-DICHLOROETHENE
<0.5 n-BUTYLBENZENE.
<1.0 1,1,2-TRICHLOR0 ETHANE
<0.6 NAPHTHALENE
<2.0 TRICHLOROFLUOROMETHANE
<1.0 HEXACHLOR0BUTADIENE
<2.0 C-DICHLOROBENZENE
<1.0 o-CHLOROTOLUENE
<1.0 METHYLENE CHLORIDE
<1.0 p-CHLOROTOLUENE
<1.0 cis-1,2-DICHLOR0 ETHYLENE
<0.5 1,3,5-TRIMP.THYLBENZENE
<2.0 o-DICHLOROBENZENE
<1.0 p-ISOPROPYLTOLUENE
<1.0 1,2,4-TRICHLOR0 BENZENE
<2.0 1,1-DICHLOROPROPENE
<1.0 DIBROM0 METHANE
<1.0 loo-PROPYLBENZENE
<1.0 1,2-DIBROM0 ETHANE ( "",4 )
<0.1 tert-BUTYLBENZENE
<2.0 1,2-DIBROMO-3-CHLOLOPROPANE
<0.1 see-BUTYLBENZENE
<2.0
-XYLENE
<1.0 BROM0 BENZENE
<1.0 tYLENE
<1.0 m-XYLENE
<1.0
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LAW VAULT LEAK DETECTION Separate systems exist for detection of liquid build-up in the annular region surrounding the LAW tank proper, and for groundwater intrusion through the concrete vault structure.
The intrusion system collects liquid seepage into the space between the vault bottom liner and the concrete walls and floor.
The intrusion stand-pipe senetrates the vault bottom liner and is seal welded to the liner.
Above the l
sottom liner, the stand-pipe has a hole to prevent intrusion water from getting too high behind the liner in the event of a pump failure.
The level is continuously monitored in the Control Room, and audible / visual alarms alert the operator that the pump-out system has malfunctioned.
Intrusion liquid level is maintained by an automatic sump pump but can be manually controlled.
Samples of discharge to sanitary waste treatment ponds are collected monthly.
The system is tested monthly according to Section 4.4 of license SNM-2500 to verify:
Intrusion water aump-out capability Intrusion water ligh level alarm function Positive shutdown of intrusion pump if there is a high level in the annular tank Concentrations of radioactivity are <5.0 x E-06 microceries per milliliter (gross gamma)
The annular tank sump, located between the inner tank wall and the concrete vault liner, collects potential leakage from the inner tank.
In addition to level instrumentation and alarms typical of other systems of this type, there are several methods of empty-out, including primary and secondary airlifts used in conjunction with a vacuum air jet and an air operated diaphragm pump.
A sampling station is located in the common line for these empty-out systems.
Sam)1es are obtained for any and all empty outs and all discharges are routed bac( to the LAW inner tank.
Quarterly license compliance tests verify leak-detection and pump-out capability.
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FUEL STORAGE BASlfi LEAK DETECT 10ii The basin leak detection system consists of a continuous level monitoring instrument with audible and visual alarm functions in the Control Room, to i
detect liquid level in the void behind the basin liner and the concrete structural walls / floor of the unloading and storage basins, i
Collection channels, formed in the concrete at the concrete and steel liner interface, interconnect with a perimeter channel that slo)es to a low point which is the bottom of a six inch diameter stand-pipe.
T11s pipe and perimeter channel are embedded in the reinforced concrete structural walls.
A build up of liquid, whether by infiltration, condensation, or liner leakage, is sensed by the dip tube and differential pressure level indication transmitter.
The indicating range is from 0 to 200 inches of water.
Empty out is provided by an airlift and steam jet pump arrangement with a sampling station in-line between airlift output and the jet pump suction.
Liquid removed is then discharged to the LAW vault.
Weekly license compliance tests are performed to verify operability of the high level alarm function; monthly to calibrate the level instrument and quarterly to verify operability of the empty out system and determine-by sample analyses that no liner leakage has occurred.
The expansion gate, located in the south wall of Basin-2 also has a sump formed by the inner and outer gates which are sealed to the basin walls.
This void has an expanded scale level indication instrument and electric pumpout systems. A divider plate or dam isolates the level instrument and pump to the compartment closest to the basin.
Build-up of liquid in either compartment is identified, based on sample analyses, as originating from the basin, groundwater, or other sources.
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