ML20009B922
| ML20009B922 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 06/29/1981 |
| From: | Barrett L Office of Nuclear Reactor Regulation |
| To: | Harold Denton, Snyder B Office of Nuclear Reactor Regulation |
| References | |
| CON-NRC-TMI-81-037, CON-NRC-TMI-81-37 NUDOCS 8107200024 | |
| Download: ML20009B922 (6) | |
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DISTRIBUTION:
IMI Program office /HQ r/f TMI Site r/f CENTRAL FILE NRC PDR LOCAL PDR Site Operations File June 29, 1981 MSLC NRC/TMI-81-037 rq y($
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MEMORANDUM FOR:
Harold R. Denton, Director, 1 42.07 OI A 'II
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V Bernard J. Snyder, Program 91 rector, TMI Program Office
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FRQ4:
Lake H. hirrett, Acting Dep'aty Program Director, TMI Prog.as Office
SUBJECT:
NRC WI PROGRN4 0FFIO. WEEKLY STATUS REPORT Enclosed is the status report for the period of June 21 - 27, 1981.
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Lake H. Barrett Acting Deputy Program Director THI Program Office
Enclosure:
As stated cc: ED0 OGC Office Directors Commissioner's Technical Assistants NRR Division Directors NRR A/D's Regional Directors IE Division Directors TAS EIL TMI Program Office Staff (15)
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NRC TMI PROGRAM WEEKLY STATUS REPORT Week of June 21 - 27, 1981 Plant Status Core Cooling Mode:
Heat transfer fram the reactor coolant system (RCS) loops to Reactor Building ambient.
Available Core Cooling Mode.;: Decay heat removal systems.
Long term
, cooling "B" (once through steam generator-B)
RCS Pressure Control Mode:
Standby Pressure Control (SPC) System.
Backup Pressure Control Modes:
Mini Decay Heat Removal (MDHR) System.
Decay Heat Removal (DHR) System.
Major Parameters (as of 0400, Juna 25,1981) (approximate values)
Average Incore Thennoccuples: 117 F 4
Maximum Incore Thermocouple:
144 F RCS Loop Temperatures:
A B
Hot Leg 118 F 121 F Cold' leg (1) 70 F 73 F (2) 72 F 72 F RCS Pressure: 97 ps.g 7eactor Building:
Temperature:
77 F Watcv level:
Elevation 290.9 ft. (8.4 ft. from floor) via penetration 401 manometer Pressure:
-0.2 psig Concentration: 6.2 x 10-6 uCi/ml Kr-85 (Sample taken 6/25/81).
Effluent and Er.vironmental (Radiological) Infonnation 1.
Liquid effluents from the TMI site released to the Susquehanna River after processing, were made within the regulatory limits and in accordance with hRC requirements and City of Lancaster Agreement dated February 27, 1980.
During the period June 21, 1981, through Jurc3 27, 1981, the effluents
' contained no detectable radioactivity at the discharge point and individual effluent sources which originated within Unit 2 contained no detectable radioactivity.
Airborne effluents are reported on a monthly basis.
2.
Results Environmental Protection Agency (EPA) Environm s
3.
follows:
The EPA measured Kr-85 concentrations (pC i
results:
June 12 - June 19,1981 Location
-(pCi/md) 23 Goldsboro 28 Observation Center 21 Middletown 27 Yorkhaven All of the above levels of Kr-85 are considered to ground levels.
The EPA reported that the Yorkhaven sample results for,the were not obtained due to period June 5 - June 12,1981, procedural difficulty.
No radiation above normally occurring background levels wasfrom detected in any of the samples collectedand gamm
- 1981, through June 25, 1981.
Results from NRC monitoring of the environ-FIRC Environmental Data.
ment around t,he TMI~sTte were as follows:
4.
The following are the NRC air sample analytical results for the onsite continuous air sampler:
(uCi/cc)_
Sample _
Period _
<8.8 E-14 <8.'8 E-14 June 17,1981 June 24,1981 lip-273 Licensee Radioactive Material and Radwaste Shipments 5..
22,1981, a 40 ml Unit 2 reactor coolant ii sample was sent to Babcock and Wilcox (B&W), Lynchbu On Monday, June 23,1981, one.4' x 4' EPICOR-II dewatered S.
resin liner (liner DF-2) from Unit 2 war shipped to U.
On Tuesday, June Ecology, Richland, Washington.
On Tuesday, June 23, 1981, 74 drums and 10 metal boxes of Unit 2 LSA compacted and noncompacted waste were shipped to U.S. Ecology, Richland, Wa.shing. ton.
On Wednesday, June 24,1981, one 4' x 4' EPICOR-II dewatered resin liner (liner DF-3) from Unit 2 was shipped to U.S.
Ecology, Richland, Washington.
On Thursday, June 25, 1981, 60 drums of Unit 2 contaminated laundry were shipped to Tri-State Industrial Laundries, Utica, New York.
On Friday, June 26,1981, one 6' x 6' EPICOR-II dewatered resin liner (liner DS-4) from Unit 2, and eight metal boxes of noncompacted LSA waste from Unit I were shipped to U.S. Ecology, Richland, Washington.
On Friday, June 26,1981, one 4' x 4' EPICOR-II dewatered resin liner (liner DF-6) from Unit 2 was shipped to U.S.
Ecology, Richland, Washington.
On Friday,' June 26, 1981, a Hittman cement mixer and componerts used,in Unit 1 were shipped to Hittman Nuclear Developident Co.,
Columbia, Maryland.
On Saturday, June 27.,1981, one 4' x 4' EPICOR-II dewatered liner (liner DF-1) from Unit 2 was shipped to U.S. Ecology, Richland, Washington.
Major Activities 1.
Submerged Demineralizer System (SDS).
Functional tests are complete with the exception of a few items which are undergoing engineering evaluation and further testing.
Operator training on components not involved with the outstanding functional testing is in progress.
The operator train.ag does not involve processing of contaminated water. The licensee is preparing procedures for NRC approval.
~
The Three Mile Island Program Office has approved 10 of the 37 procedures which will be used to operate the SDS.
Twenty one of the 37 procedures are needed to conrence transferring Reactor l
Coolant Bleed Tank Water to the bDS Feed Tanks.
The water is expected to be transferred during the week of June 29, 1981.
Shortly following the transfer, the water will be processed using the SDS.
l 2.
Reactor Building Entry During the twelfth entry, on June 25, 1981, problems developed with the mechanical interlock mechanism on the reactor building (RB) l personnel airlock doors.
The resultant delays caused the polar l
crane inspection uf.ich was scheduled for the twelfth entry to be postponed.
All the other scheduled tasks were completed successfully before the door problem developed.
The polar crane i'nspection was rescheduled for a special entry on Wednesday, July 1,1981 The mechanical linkage to the interlock, which serves to ensure that one airlock door is completely closed before the other door can be opened, became loose and prevented personnel from opening the outer airlock door.
No one was inside the RB or in the airlock during the malfunction.
The outer airlock door was eventually opened and the loose linkage was repaired.
However, following the repair, it was decided that the personnel involved with the scheduled two hour crane inspection should not continue with the physically demanding crane inspection.
During RB entries, a second personnel airlock which is an integral part of the equipment hatch, serves as an alternate means of egress from the RB.
The equipment hatch airlock was verified operational and was available for emergency u'se.
During the twelfth entry the following tasks were completed successfully:
Closed circuit television maintenance; Lighting circuit repairs; Installation of lights in the enclosed stairwell; 2
Intercom repairs; and Smear sur,veys and sample removal.
3.
EPICOR-II Prefilter (PF-16) Analysis Results.
Preliminary results on the PF-T6 liner examination were reported by the Battelle Columbus Laboratories (BCL).
PF-16 is on'e of the 50 high specific activity l
first stage EPICOR II treatment process liners for the accident generated water collected in the Auxiliary Building.
This liner l
was shipped to BCL.on May 19, 1981, for examination as part of a DOE sponsored resin characterization program to futher develop technology and expand knowledge for processing high specific activity resins and to evaluate liner material compatibility.
Analysis results on the gas fraction drawn from the top of the l
inside of the liner i~hdicated:
nitrogen plus carbon monoxide-79.5%,
l hydrogen-12.2%, carbon dioxide-5.4%, argon-0.9%, oxygen-0.2%
Hydrocarbons
- 0.'1%.
Visual television examination, of the external surfaces of the liner was performed.
There were ao indications of liner degradation.
Television examination of the li~ner interior indicated no excessive corrosion of the interior of the liner, although some pitting corrosion was visible.
The inside surface of l
5 the top cover, which had no protective coating, indicated surface,
corrosion (this surface is not in contact with radioactive resins).
External'ganma scans revealed that the bulk of the radioactivity is contained within the top)five to six inches of the resin ( total resin depth is 36 inches.
The radiation levels at the top and bottom of the resin bed were approximately 1000R/hr and 20R/hr. -
respectively.
Gas samples taken from inside the liner have confirmed the prediction that hydrogen is generated inside these prefilters.
Oxygen, which is necessary for a combustible mixture, was also confirmed to be depleted to a level to preclu.de any internal combustion or explosion.
This fact coupled with the lack of. an ignition source eliminates concern for any imminent safety hazards.
Nonetheless, the licensee has instituted procedural controls and cell module sampling as precautionary measures to assure no flammable co'ndition exists.
Additionally, the licensee is developing a plan for future handling of the remaining 49 filters.
' Data gathering and analysis will ' continue with additional information made available as received.
4.
Shipment of EPICOR-~II Second and' Third Stage Liners. On June 27, 1981, the final liner of the twenty-two (22) EPICOR-Il second and ' third stage liners left.the TMI site for Hanford, Washington.
These 22
~
I liners, which were shipped over a three month period starting in l
April 1981, were part of the EPICOR-II' ion exchange process used to l
cleanup the accident generated water collected in the Unit II Auxiliary Building.
Future Meetings _
l.
On Wednesday, July 1,1981, Lake Barrett will meet with area mothers to discuss vafious subjects related to TMI.
2.
On Thursday, July 9,'1981, The Advisory Panel for the Decontamination of Three Mile Island, Unit 2 will be meeting from 7:00 p.m. to 10:00 p.m. in the Holiday Inn, 23 South Second Street in Harrisburg, to discuss the current status of cleanup sctivities at TMI. This l
meeting will be open for public ' observation.
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