ML20062E048
| ML20062E048 | |
| Person / Time | |
|---|---|
| Site: | LaSalle  |
| Issue date: | 10/26/1990 |
| From: | Morgan W COMMONWEALTH EDISON CO. |
| To: | Schumacher M NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| NUDOCS 9011190236 | |
| Download: ML20062E048 (8) | |
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1400 Opus Place
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' Downers Grove, Illinois 60515 y
October 26,1990 Mr. Martin Schumacher U.S. Nuclear Regulatory Commission
- Region lli
(
799 Roosevelt Road Glen Ellyn,IL 60137
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Subject:
LaSalle County Station Urats 1 and 2 Cleanup of Radwaste Tank Rooms i
Mr. Schumacher:-
l Attached is a report outlining the Lessons Learned from the cleanup of the 1WZ for the cleaning of similar tank (Leaners) room floor which will be utilized to develo Collector and Process Tanks 7
- rooms, This report is being submitted as requested at the May 30,1990 NRC Rlli, Commonwealth Edison management meeting. This meeting was held to discuss the
- radiological conditions.of the LaSalle County Station Radwaste Tank Rooms.
' If there any questions or comments regarding this matter, please contact this office.
Very truly yours, b
'I W.E. Morgan :
4 tf' Nuclear Licensing Administrator TWM/Imw
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3 October 18, 1990 Tot Mr. William R. Huntington Fromt' Paul L. Ayres Subject URC/ Waste Sludge Tanks Room Floor Cleaning Using lessons learned from the cleaning of the IWZ Collector & Process Tanks (beaners) Room Floor, a plan was developed for the cleaning of a similar floor in the URC/ Waste Sludge Tank Room.
During both, the lessons learned meetings and the new plan development, the laborers foreman, laborers and.the-Red Protection Techs opinions, observations and ideas were listened to very closely.
In manyf instances, _these items were followed through.
- Attached, please find a copy of the lessons learned from the "Leaners" Room cleaning.
It is worded as'a look ahead to the subject cleaning, with all items having been' addressed..
The process for the URC/ Waste Sludge Tank Room is as f.ollows:
1..
The' floor drains in the adjacent pump room will be plugged, as it is common to the tank room floor drains.
s 2.
=The-tank room floor drain sump, external from the room, will have-an air sparger set in:it to keep the contents in a suspended form for ease.of pumping.
The sump will be monitored with a video camera viewed lfrom the project control point. The media that is slurried
~ down the drain to this swnp will be1 pumped to the URC Sludge Tank, utilizing a remote controlled M-8 double diaphragm pump. The area around;the sump will be shielded with lead curtains.
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3 l Remote controlled cameras with Pan & ' Tilt'will be set in the tank -
room at two' strategic locations to observe'the robot's activities and to-t.ssist-in-its use.
4.
The floor of.the tank room will be flooGed with ~6 inches of water'to assist in the mobility of the media-to the floor drain.
5.
The ARD Robot, fitted with a " Dozer" blade and a low pressure hydrolance, will push the floor media to the fit,vr drain which was fitted with a hydrolance.
ZCADRAD/80
t' The' initial events gf the job includes two separate operations. The first was completed by. Rad Protection to set one camera. This allowed a video to be made of the-room.
An Alara meeting was held to discuss the one operation that will have to be made to prepare the room for the use of the ARD Robot. : Utis one operation will include:
1.
S11tting the dozen or so plastic bags in'the NW corner of the room and putting the media on the floor.
2.
Removing the empty plastic bags.-
3.
Moving the two 2" hoses off of the floor to minimize interference for the robot.
4.
Setting the floor drain hydrolance if the robot cannot open the drain line.
The above 4 events are estimated by the laborers foreman and the laborers to be 20 minutes each for two men.
When the robot is put into the room, the other camera will be placed inside the doorway.
Using'the method outlined above and. assuring that the job prerequisites are completed' prior to the job start, the expected results are to have no more than 1/4" of material remaining in some remote irregular surfaces of the floor.
Final cleanup of the' remaining' material may be completed manually if area 1 dose rates are. low enough to pe imit, otherwise, additional efforts will be made'to either further reduce'the dose rates or continue with the use of
'I remotely operated' devices.
The. tentative start date is October 15, 1990 and is to.be completed prior to December 31, 1990.
If you 1 ave any questions, please contact me at LaSalle, X2874.
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Paul L. Ayres
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Radwes te Planne r,..
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Melinda Marchetti Station-Alara Group PLA/MKM/ ram' O
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. ATTENDEES OF LEANERS CLEANING LESSONS LEARNED MEETING-From:
PAUL 4 L.-
AYRES.
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. Subject - LEANERSoCLEANING LESSONS LEARNED l
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' ri LISTED-BELOW ARE-THE' ITEMS THAT~WERE-BROUGHT UP AT TODAYS MEETING.: PLEASE' REVIEW THESE ITEMS AWD' ADD OR COMMENT ON THEM: IF~
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'YOULHAVE ANY. ADDITIONAL COMMENTS..WE WILL REVIEW THESE AS THE.
V FIRSTblTEM OF THE'URC' TANK.' ROOM FLOOR CLEANING METHOD MEETING ON-
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' l '. - -NEED TO'REVIEWLTHE' ITEMS [THAT'WOULD'CAUSE'US TO MAKE.AN ENTRY s
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S' INTO THE ROOM DURING THE' CLEANING PROCESS,7 ADDING LINES,.
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l REPAIRING; LINES, ROBOT REPAIRS,.ETC.
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FREMOTE. AIR 1OPLVALVES.,WOULD BE BETTER ON>THE TEMPORARY: PUMP (S)?
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, o.TO MINIMI ZE THE1 DOSE.- TAKEN' IN ' OPERATING THE EQUIPMENTJ IN ;THE w,.e
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3 FOR!.THE PUMP AND'ONE SPARE.
J 6TANKLROOM TOLDO'THE PROCESS,
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'UP: FRONT' STANDARDIZATION.OF'THE= EQUIPMENT ASSEMBLED;FORDTHE-
.l PROCESS l PRIOR :--TO STARTING - THE JOB. IE FITTINGS, COUPLINGSi-en1 J M' 6 REDUCERS,. HOSES,,ETC.
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NEED.A STAND'FOR'THE-M-8 PUMP'SO'IT DOES.NOTTBOUNCE AROUND
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INCLUDE HANDLES.ON THE' SIDE.0F THE STAND.
-l TSELF DESTRUCTING.1TO
- TO FACIL'ITATE TRANSPORTING THE PUMP / STAND ASSEMBLY. THELPUMP O'
LSHOULD BE ADLE TO SLIDE IN AND OUT OF THIS ASSEMBLY.
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SUPPLY A. DRAWING OF THE PROCESS SO EVERYONE ON THE. JOB IS AWARE OF THE SYSTEM AND ARRANGEMENT.
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ALL PEOPLE INVOLVED IN THE PROCESS / METHOD DEVELOPMENT'SHOULD BE' INVOLVED IN THE DECISION MAKING PROCESS OF ESTABLISHING
-THE METHOD AND FLOW OF EVENTS, AS THEY PROBABLY HAVE MORE-l AWARENES" OF THE SPECIFICS OF THE JOB.
-7.
STRING ALL HOSES UP EI1HER WITH HILTIS WITH HOOKS ON THE WALL OR ON EQUIPMENT, TO AVOID THE HINDRANCES OF THE REMOTE CONTROLLED EQUIPMENT.
8.1 ! SET UP AN AIR AND MC WATER MANIFOLD WITH MULTI CONNECTION
-POINTS.
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HAVE:ALL HIGH WEAR ITEMS SPARE PARTS STAGED AT THE-JOB SITE r
- PRIOR'TO THE JOB START.
' 10.nCOMMUNICATIONS BETWEEN THE PERSON (S) IN THE ROOM'AND THE OUT PEOPLE'IS EXTREMELY IMPORTANT. MUST BE GOOD RELIABLE COMMUN-ICATIONS EQUIPMENT. THROAT MIKES ARE GOOD FOR THIS.
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' 11;.= THE HIGH' HEAT ENVIRONMENT OF THESE ROOMS SHOULD BE LOOKED ATc TO BE1 REDUCED TO ENHANCE THE WORKING ~ CONDITIONS.
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.THE ROBOT TRACKS'WERE INSUFFICIENT. THE ROBOT SHOULD BE MODIF.IED SO THE TRACKS DO NOT COME OFF SO EASILY; ALSO
.THE MOTORS.SHOULD BE THERMALLY PROTECTED TO ELIMINATE THE POSSIBIL'ITY OF MOTOR BURNUP. BOB' BLAINE /PETE-HAMEBY'ARE FOLLOWING-MOD OF THE ROBOT.
- 13. A DAILY LOG WILL BE KEPT AT THE JOB SITE TO NOT ONLY LOG WHAT ACTIVITIES WERE DONE AND WHEN. BUT THE DAILY ORDERS WILL'BE
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L WRITTEN IN'THE LOG FOR'EVERYONE TO FOLLOW. IF A' DEVIATION TO
- A" DAILY ORDER DEEMED NECESSARY'THE' PROJECT LEAD WILL BE NOTIFIED PRIOR TO DOING ANYTHING DIFFERENT TO WHAT IS IN THE-l DAILY-ORDERS.
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- 14. NEED HARSH ENVIRONMENT CAMERAS, NOT-THE STANDARD ONES NOW USED.
- 15. MUST HAVE'A DEDICATED TECH FOR THE ENTIRE JOB.
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THE PREFERRED HOURS ARE 8 HOURS ON DAYS WITH E-3. HOURS AFTER-16.
THAT SHIFT TO. CLEAN UP.AND PREP / STAGE THE AREA FOR THE NEXT
! DAY, SO THAT'NO LAG'IN kHE'FIRST PART OF THE DAY IS EXPERIENCED.:WHEN THE LABOR FORCE COMES'OUT FOR BREAK AND 1
(LUNCH, HAVE TWO< LABORERS STAY.AND MOP THE PADS AND EMPTY THE-LAUNDRY.
17.. ALWAYS' ASSURE A FLUSH'OF THELPROCESS LINES IS' COMPLETE PRIOR 1TO SHUTTING :DOWN = FOR THE DAY. TO' MINIMIZE 'THE SETTLING OF' CRUDE IN;THE LINES WHICH WILL CAUSE PROBLEMS.THE NEXT' DAY.
tie.-THE USE OF-REMOTE' TELE DIGIS FORiDOSE VERIFICATIONS'ARE VERY
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-DESIRABLE;IF WE COULD GET'BY THE 9V BATTERY TYPE. THE D
EFFECTIVE USE IS-LIMITED TO '8 HOURS WITH THE BATTERY.
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DISCONNECT THE~ ALARM FROM THE-UNIT BECAUSE THIS'IS THE MAJOR DRAINEON THE BATTERY.
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- 19. SAMPLE:THE: FLOOR 1 MEDIA PRIOR TO HANDLING AND PROCESSING.
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SAMPLE FOR TOCS AND ACIDITY. CHEMISTRY TO SAMPLE.
1 2MS. SET A GOAL UP FRONT AS TO WHAT POINT WE WILL BE DONE BASED ON THE ACTIVITIES TO FOLLOW IN THAT AREA. NEED HOURS FROM ENG-INEERING AS TO HOW LONG THE INSTALLATION OF THE FCI PROBES I
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- 21. ARE' TENT MODIFICATIONS NECESSARY FOR OUT MAN SUPPORT e
t ACTIVITIES ? JIN DIETZ TO INSPECT THE URC TENT.
. 22. ONLY ONE PERSON SHALL BE IN CHARGE OF THE PROJECT AND MUST BE DEDICATED TO THE PROJECT, NO OTHER JOBS AT THE SAME TIME.
HOLD A DAILY MORNING MEETING TO NAIL DOWN THE PROBLEMS AND TO 23.
1 SET THE DAILYLACTIVITIES.
-,2. HAVE. DOSE VERIFICATIONS SURVEYS WHEN'NEEDED READY FOR'
' 4 MORNING' MEETING REVIEW.
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- 25. :T CAN' ENGINEERING-DETERMINE IF A SHIELDING STAND CAN-BE= MADE. TO SHIELD THE CONE l AREA EXTERNAL FROM THE TANK ?
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DISTRIBUTE TO:
I JIM HENERY RADWASTE GROUP STEVE LORENZ STATION MEN GROUP K.
W.
HEDGSPETH ALARA 1
BILL BLAND.
. STATION MEN GROUP
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1 TERRY ELUE-STATION MEN GROUP 4
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' JOHN KNUDSON--
. STATION MEN GROUP i
l-R.
BLAINE ALARA M.' MARCHETI ALARA
'PETERLHAMBY.
NUCLEAR SERVICES:
(G.O.)
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'K.' FRANCIS 4 RADWASTE GROUP i
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