ML20004B741
| ML20004B741 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 05/11/1981 |
| From: | Barrett L Office of Nuclear Reactor Regulation |
| To: | Harold Denton, Snyder B Office of Nuclear Reactor Regulation |
| References | |
| CON-NRC-TMI-81-028, CON-NRC-TMI-81-28 NUDOCS 8105290458 | |
| Download: ML20004B741 (6) | |
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May 11, 1981
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MEMORANDUM FOR:
Harold R. Denton, Director, Office of Nuclear Reactor Regulation Bernard J. Snyder, Program Director, TMI Program Office FROM:
Lake H. Barrett, Acting Deputy Program Director, TMI Program Office
SUBJECT:
NRC TMI PROGRAM OFFICE WEEKLY STATUS REPORT Enclosed is the status report for the period of May 3 - 9, 1981.
Lake H. Barrett Acting Deputy Program Director TMI Program Office
Enclosure:
As stated cc: EDO OGC Office Directors Comissioner's Technical Assistants NRR Division Directors NRR A/D's Regional Directors IE Division Directors X005 X0MA TMI Program Office Staff (15)
PHS EPA DOE Projects Br. No. 2 Chief, DPRI, RI DPRI Chief, RI Public Affairs, RI
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NRC TMI PROGRAM OFFICE WEEKLY STATUS REPORT Week of May 3 - 9, 1981 Plant Status _
Core Cooling Mode: Heat transfer from the reactor coolant system (RCS) loops to reactor building' ambient.
Available Core Cooling Modes: Long-term cooling "B" (once through steam generator-B); decay heat removal systems.
RCS Pressure Control Mode: Standby Pressure Control,(SPC) System.
Backup Pressure Control Modes: Mini Decay Heat Removal (MDHR) System.
De' cay Heat Removal (DHR) System.
Major Paraneters (as of 0430, May 1,1981) (approximate values)
Average Incore Thermocouples: 112 F Maximum Incore Thermocouple:
140*F RCS Loop Temperatures:
A C
Hot Leg 112 F ll5*F Cold Leg (1) 65 F 65 F (2) 66 F 65*F RCS Pressure: 100 psig Reactor Building: Temperature: 60 F Water level: Elevation 290.7 ft. (8.2 ft. from floor) l via penetration 401 manometer Pressure:
.5 psig Concentration:
1.5 x 10-5 Kr-85 (sample taken 5/4/81)
Effluent and Environmental (Radiological) Information l
1.
Liquid effluents from the TMI site released to the Susquehanna River after processing, were made within the regulatory limits and in accordance with NRC requirements and City of Lancaster Agreement dated February 27, 1980.
During the period May 1,1981, through May 7,1981, the effluents contained no detectable radioactivity at the discharge point and individual effluent sources which originated within Unit 2 contained no detectable radioactivity.
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Environmental Protection Agency (EPA; ;nvironmental Data.
Results from EPA monitoring of the environment around the TMI site were as follows:
3 The EPA measured Kr-85 concentrations. (pCi/m ) at several environmental monitoring stations.and reported the following results:
Location April 24 - May 1,1981 3
(pCi/m )
Goldsboro 24 I
Observation Center To be reported next week Middletown 29 Yorkhaven 28 l
l All of the above levels of Kr-85 are considered to be back-ground levels.
No radiation above normally occurring background levels was detected.in any of the samples collected from the EPA's air and gaana rate networks during the period from April 30, 1981, through May 7,1981.
l 3.
NRC Environmental Data.
Results from NRC monitoring of the environ-ment around the TMI site were as follows:
The following are the NRC air sample analytical results for the onsite continuous air sampler:
Sample Period (uCi/cc)
(uCi/cc)
HP-266 April 29,1981 - May 6,1981
<8.7 E-14
<8.7 E-14 l
l 4.
Licensee Radioactive Material and Radwaste Shipments On Monday, May 4,1981, a 40 ml Unit 2 reacto'r coolant sample was sent to Babcock and Wilcox (B&W) Lynchburg, Virginia.
On Monday, May 4,'1981, a box containing assorted smears from Unit I were sent to the Westinghouse. Electric Corporation, Madison, PA.
i On Monday, May 4, 1981, a box containing assorted smears fr'm o
Unit 1 were sent to Teledyne Isotopes, Westwood, N.J.
On Tuesday, May 5,1981, two HN-100 liners containing solidified evaporator bottoms from Unit 1 were shipped to U. S. Ecology, Hanford, Washington.
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3 On Thursday, May 7,1981, assorted equipment used for the solidification of the Unit ? evaporator bottoms was shipped to the Calvert Cliffs Nuclear Station, Lusby, Maryland.
On Thursday, May 7,19'.,1, a source range pre-amplifier from Unit 2 was sent to Stadia National. Laboratories, Albuquerque, New Mexico.
Major Events i
1.
Reactor Building Entry and Purge.
The tenth entry into the Unit II reactor building (RB) is scheduled for Thursday, May 14, 1981. Twenty-three men are expected to enter the RB.
Four major tasks have been planned for the entry.
These include:
l 1.
Sump water and sludge samples; 2.
Large scale decontamination experiment; l
3.
Radiation survey of the control rod drive structure; and t
4.
Installation of safety equipment on the polar crane.
The sump water and sludge experiment is designed to retrieve six water samples from three elevations in the RB.
Additionally, two samples will be taken near the RB floor (281 ft. level) to obtain samples of any solid matter which may have settled out of the water.
Each sample The samples will be shipped to volume will be approximately 80 ml.
EG&G laboratories for comprehensive analyses.
The samples will be taken through an open hatch cover on the 305 feet level i,n the RB.
The radiation levels in the area of the open hatch cover are expected to be between 10 and 20 R/hr.
The five individuals assigned to retrieve the samples are not expected to exceed 850 mr each, of total body exposure.
The decontamination experiment will include low and high pressure water sprays over a 2000 square foot area in the RB. Swipes and area surveys will be taken before and after the decontamination to assess the effectiveness of the decontamination techniques.
Based on flow calculations, it is expected that a maxinium of 580 gallons of water will be added to the RB sump during the experiment.
Water previously processed by EPICOR II will be used.
The three individuals involved in the decontamination experiment are not expected to exceed 850 mr each, of total body exposure.
The control rod drive radiation survey is being performed in preparat. ion for future work in the reactor head area.
Safety equipment is being l
installed on the polar crane to facilitate future crane surveys and maintenance.
A RB purge will commence one day prior to the entry.
It is expected that less t*. n three curies of Krypton 85 will be released during the purge.
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4 Preparation of the Safety Submerged Demineralizer System (SDS)_.
Evaluation Report (SER) by the TMI Program Office is in progress 2.
On f;
although some necessary information has not yet been recei[
i April 30,1981, F'
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the needed infonnation.
I The licensec is performing functional test's of the SDS components The testing to verity that the equipment will operate as designed.The licensee has I.
does not involve processing of contaminated water. gallons of EPICOR 112,000 The fuel pool will be completely filled when this phase of pumped approximately r
the fuel pool.
functional testing is completed and concerns raised about airborne i
tritium sampling are resolved (this item is discussed in the next i.
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paragraph).
Elevated Tritium Levels in Fuel Handiing Building. As reported in the j
1981 at.about 10:00 p.m.,
3.
previous weekly event section, on April 29,(H-3) airborne concentration the licensee obtained an indicated tritiumof 3.1 x 10-5 uC l
the partial fill of B" spent fuel pool. samples the FHB was declared an airborne 30, 1981.
fuel pool filling operation was secured at 2:30 a.m., April Sampling of both the FHB exhaust (HP-R 221B)
The licensee has determined that the flow through the tritium sampler pump was higher than expected (appa this time.
concentration has been calcolated to be well below the H 7 1/ min).
5 x 10-6 uCi/cc.
scheduled to report their findings on 5/11/81. As a The bioassays detected no uptake high H-3 concentrations were noted.
of H-3.
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5 Meeting Held _
On Tuesday, May 4,1981, Lake Barrett conducted a plant tour for area mothers and responded to general questions regarding the cleanup program of TMI Unit 2.
Future Meetings On Wednesday, May 14, 1981, Lake Barrett, Oliver Lynch and Frank 1.
Congel will participate in~a meeting with the Susquehanna Valley The Alliance on the Programmatic Environmental Impact Statement.
meeting will be held at 7:30 p.m., in the Friends Meeting House in Lancaster at 110 Tulane Terrace.
On Thursday, June 4,1981, the Advisory Panel for the Decontamination 2.
of Three Mile Island Unit 2 will meet from 7:00 p.m. to 10:00 p.m.
in the City Council Chambers, Kendig C. Bare Public Safety Building, 208 North Duke Stre'et, Lancaster. At this meeting, which is open for public observance, the Panel will discuss Radiation Worker Exposure and Health Effects.
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