ML20024D964

Requests Weekly Status Rept of 830523 & Any Other Documentation Describing Capabilities & Roles of Robot Fred

ML20024D964
Person / Time
Site:	Crane
Issue date:	07/11/1983
From:	Drey K AFFILIATION NOT ASSIGNED
To:	Office of Nuclear Reactor Regulation
Shared Package
ML20024D963	List: ML20024D962 ML20024D964
References
NUDOCS 8308080618
Download: ML20024D964 (1)

Text

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Mrs. l.co A. Drey 515 West Point Ave. University City, MO 63130 o

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/%g.ff July 11, 1983 TMI Program Office u/u Of4ien of thn F vaMive-Director

-for-Operations,

Nuclear Regulatory Commission Washington, D.C. 20555 FLEASE FORWARD Gentlemen:

'.;culd you plecse send me a copy of the Weekly Status Report of May 23,1903, or any other report which describes the capabilities and roles of the robot " Fred" with respect to the decontamination of Three Mile Island Unit 27 Are there any other rebots similarly deployed?

\\

I would be happy to pay for photocopying and postage.

l Thank you, l

t 8308080618 030726 PDR ADOCK 05000320 PDR H

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UNITED STATES k

NUCLEAR REGULATORY COMMisslON

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fy WASHINGTON, D. C. 20555 i

f:ay 23, 1983

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NRC/TMI-83-032 MEMORANDuti FOR:

Harold R. Denton, Director Office of Nuclear Reactor Regulation Bernard J. Snyder, Program Director TMI Program Office FROM:

Lake H. Barrett, Deputy Program Director i

TMI Program Office

SUBJECT:

NRC Tl1I PROGRAM 0FFICE WEEKLY STATUS REPORT FOR MAY 15-21, 1983 Note that this is a new format for this report.

I,t is hoped that it better serves the needs of the various readers.

Submit any further suggestions to the U.S.

' Nuclear Regulatory Commission, ATTN: Mr. Lake H. Barrett, P.O. Box 311, Middletown, PA 17057 or call 717-948-1120.

Data from effluent and environmental monitoring systems' indicated no plant releases in excess of regulatory limits. Waste shipments and water processing tasks continued on a routine basis.

Plant parameters showed no significant changes.

General clean-up and preparations for headlift continued.

Head lift remains at least several months away. As schedules develop, they will be reported. Major

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activities this week included refurbishment of "A" spent fuel pool, ongoing decontamination in the auxiliary and fuel handling buildings, five reactor building entries supported miscellaneous tasks and continued efforts to resolve polar crane issues.

(For more details, see appropriate paragraphs below.)

Significant items included in this report are:

Auxiliary and Fuel Handling Activities Reactcr Building Activities

~c' Polar Crane Status Defueling Preparation Activities Ucste Management Activities Scheduled Activities for the Coming Week Public Meetings Data sum.ary sheets included in this report are:

Liquid Effluents Environmental Data RSdicettive Material /Radweste Shipment Cata Uater Processing Data Plant Stetus Data

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tde H. Earret:

Dguty Program Cirector Tr.I Procrem Difice Enclesu e:

As stated wj GWWc.w, -

ENCLOSURE AUXILIARY AND FUEL HANDLING ACTIVITIES:

Decontamination efforts continued during the week of May 16, 1983, and con-sisted mainly of abrasive removal.of small amounts of concrete (approximately 1 inch deep) from floor surfaces using heavy duty specialized equipment on the 282' elevation.

These treated areas were subsequently surveyed, released as radiologically clean and painted. Cleaning and decontamination of building floor drains were ongoing.

Remote hydrolasing in some of the more highly contaminated cubicles on the 282' elevation was performed using a newly acquired robot. The 400 pound wheeled robot is remotely controlled and uses a single extencLible arm to spray 150 F high pressure decontamination water over walls and. equipment.

The decontami-nation water was recycled from previous cleanup activities.

(Seeattached photo).

REACTOR BUILDING ACTIVITIES:

Five reactor building entries were completed during the week of May 16, 1983.

The majority of in containment work centered on general housekeeping tasks (trash removal, hose and electrical cable placement) and the continued air cooler internal decontamination via hydrolasing.

The second (NI-2) neutron source range detector (see Weekly Status Report of May 16,1983) verification was completed satisfactorily.

Licensee also installed four in-place continuous air samplers, two located on the D-rings, one located near the open stairwell cn the 347' elevation and one located on the 305' elevazion, but remotely sampling the 282' elevation atmosphere.

POLAR CP.ANE STATUS:

Folar crane Ic.ad testing and cperatic.ns are still delayed pending resolution of NRC conments on GPU procedures.

Resubmittal of these procedures to NRC is expected in early June.

The hRC staff has received and is currently reviewing procedures dealing with the use of the'5 ton hoist.

Utilization of the 5 ton hoist is being considered on a casc-ty-case basis.

DEFUELING PREPARATION ACTIVITIES:

'A' Spent Fuel Pecl Refurbishment.

Shortly after the March 28, 1979, accident at TMI-2, the licer.see. reccanizina the need for temporary (contingency) s:crace of larce 6-./i.s of hcidei -cer.erated radicactive water, installed a d

s.~&ie systcf in a+.: 4:

'A' spent fuel paol, located in the fuel handling tuiicinc.' This r,ne

.2s W:31'ec ir. the surrar of 1979 ahd cor.sisted of six t; air.less steel d o s,ir a 1::2 5 cc:.acity of 110,00G callens.

S'nce that ti e. 31' s ::e a:ci.w werated water in the reactor buildino if : r.a c t.eer, pm :: m :. e.-

<re :i q 3 neec for the terporary storage system.

. r 3 c c m or.. tee :w. t;se c f t r.e T t:.:nt ft.ei pool will be required for the e$er.tual renoval arc ter pc rary stcrace of fuel ano debris from the damaged reactor core, the tanks anc associated piping must be removed to allow refJrbishr.ent of the poci to its oricinal operational condition.

Engineers assigned to the fuel pool 'A' refurbishment project began establish-ment of work scope schedules and implementation plans in January of 1983 and implementation is currently underway.

The storage tank removal and fuel transporter assembly installation is scheduled to be completed by July 1984.

WASTE MANAGEMENT ACTIVITIES:

1.

EPICOR II Prefilter (PF) Shipments.

One EPICOR 11 shipment (PF-37) was made on May 17, 1983, from TM1 to the Idaho National Engineering Laboratory (Scoville, Idaho). This shipment represents the 39th liner, in a group of 50, that have been sent to INEL over the past year.

The DOE and GPU anticipate the remaining 12 prefilters will be shipped to INEL by the end of July 1983. A burial container qualification and licensing program is currently underway at INEL for a specially designed High Integrity Container (HIC) which if accepted for use at q. commercial burial facility, could be used in the eventual disposal of the EPICOR II prefilter waste.

2.

SDS Liner Shipments. The ninth SDS waste liner (D-10014), in a group of thirteen, was shipped from TMI to the Rockwell Hanford facility (Richland, Washington) on May 17, 1983. This 10-cubic foot stainless steel waste liner, which contained approximately 59,800 curies of radioactivity deposited on a zeolite ion-exchange bed, was shipped in a specially designed type B shipping cask (designed to withstand transportation acciderits). As with previous SDS shipments, this waste liner was loaded with catalytic recombiner pellets to maintain non-combustible conditions during the handling and shipment period. Because of scheduled repairs and maintent ce on the fuel handling building crane, which is used for SDS cask and liner handling, the next SDS shipment will not occur until late June 1983.

3.

Lancaster Sewace Samples.

Nine liquid sewage samples and three dried Yilter cake samples have been delivered to the TMI Program Office by the Lancaster Sewage Treatment Plant for, radiochemical analyses.

The samples have been taken to the Environmental' Protection Agency's Middletown Counting Laboratory for determination of the concentration of gamma emitting radioisotopes and tritium.

Preliminary results indicate that the Cesium-137 concentrations were not detectable. Detailed analytical results will be provided in a subsequent weekly status report.

Radioactive cesium (Cs-137) has been present throughout the earth's environment for more than 30 years, ever since the first nuclear weapon tests.

Typical background Cs-137 levels in soil in the eastern United Stated is in the 1 E-6 uCi/gm range. Milk in the 1960s had Cs-137 levels in the 1 E-7 uCi/ml range with peek actual concentrations much higher depending en local meteorological conditions, e.g. rain and stratopheric air currents during the time immediately fciicwing a weapons test.

EPA has standards for allcwable radioactivity ir, drinking water.

These standards allcw up to 2 E-7 uCi/mi of Cs-137 anc 2 E-5 uCi/ml of tritium (H-3).

3 TMI sewage generated inside the plants protected area is monitored for radioactivity content prior to shipment.

On occasion, trace levels of Cs-137 and tritium have been found in a tank load, but these levels are barely detectable being less than the above mentioned EPA approved levels i

and comparable to background soil samples.

Consequently this sewage does i

not radiologically pcse any public health and safety problems.

SCHEDULE ACTIVITIES FOR THE COMING WEEK:

Begin the scheduled maintenance of the fuel handling crane Five reactor building entries concentrat.ing mainly on building surface decontamination and general housekeeping PUBLIC MEETINGS:

Past Meeting On May 19, 1983, Lake H. Barrett met with the Concerned Mothers of Middletown to discuss cleanup operations at TMI-2 and NRC security requirements. They expressed their concern that TMI Unit I should not be restarted prior to completion of the Unit 2 cleanup.

Future Meeting On June 2,1983, Lake H. Barrett and William D. Travers will n.eet with the Concerned Mothers of Middletown to discuss TMI related issues.

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APPL}Q LIQUIDEllluENTDATA

-GPU_ Nuclear 4

Liquid effluents from the TMI site released to the Susquehanna River, after sampling and monitoring, were within regulatory limits and in accordance with NRC requirements and the City of Lancaster Agreement.

During the period May 13, 1983, through May 19, 1983, the effluents contained no detectable radioactivity at the discharge point. Individual effluent sources originating within Unit 2 contained minute amounts of radioactivity.

Calculations indicate that less than five-millionths (0.000005) of a curie of tritium was discharged.

Environmental Protection Aoency i

Lancaster Water Samples:

(7 samples)

I Covering period:

April 17 - April 23, 1983 Results:

Gamma scan negative 1

TMI Water Samples:

(6 samples)

Covering period:

April 23 - April 30, 1983 Results:

Gamma scan negative

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APPENDIX 2 f

ENVIRONMENTAL DATA EPA Environmental Data The EPA measured Kr-85 concentrations at several environmental monitoring

~ stations and reported the following results:

Location April 15,1983 - April 29,1983 3

(pCi/m )

Goldsboro 25 Middletown 27 Yorkhaven Equipment Malfunction TMI Observation Center 24 No radiation above normally occurring background levels was detected in any of the samples collected from the EPA's air and gamma rate networks during the period from May 11, 1983, through May 19, 1983.

NRC Environmental Data.

Results from NRC monitoring of the environment around the TMI site were as folicws:

The following are the NRC air sample analytical results for the onsite continueus air sampler:

1-131 Cs-137 Sample Period (uCi/cc)

(uCi/cc)

HP-370 May 12, 1983 - May 19, 1983

<7.4 E-14

<7.4 E-14

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APPENDIX 3 SHIPMENTS:

RADI0 ACTIVE MATERIALS /RADI0 ACTIVE WASTE On May 16, 1983, 102 drums containing contaminated laundry from Units 1 and 2 were shipped to Interstate Uniform, New Kensington, Pennsylvania.

On May 17, 1983, one CNSI 1-13C-II (Type B) shipping cask containing i

Unit 2 SDS liner No. D10014 was shipped to Rockwell Hanford Operations, Richland, Washington.

On May 17, 1983, one CNSI 8-120-3 shipping cask containing Unit 2 EPICOR prefil ter No. PF-37 was shipped to EG&G Idaho, Inc., Scoville, Idaho.

On May 18, 1983, 132 drums containing LSA compacted trash from Units 1 and 2 were shipped to U.S. Ecology, Hanford burial site, Richland, Washincton.

On May 20, 1983, 78 drums containing contaminated laundry from Units 1 and 2 'were shipped to Interstate Uniform, New Ker.sington, Fennsylvania.

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APPENDIX 4 WATER PROCESSING DATA Submerged Demineralizer System (SDS) l SDS processed approximately 12,350 gallons of tank. farm flush water during the week.

This water had been processed in a previous batch and was used to flush the tank farm in an attempt to reduce dose levels in the "A" spent fuel pool, where the tank farm is located, to facilitate work in the pool.

(See "A" Spent Fuel Pool Refurbishment.)

SDS Performance Parameters May 16, 1983 to May 18, 1983 Average Average Percent Radionuclide Influent Effluent Removed (uc/ml)

(uc/ml)

Cesium 137 2.8 x 10-1 2.0 x 10-5 99,99 Strontium 90 2.0 x 10-1 2.0 x.10-4 99.90 EPIC 0R II EPICOR II is currently in a shutdown mode.

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0 APPENDIX 5 PLANT PARAMETERS Core Cooling Mode:

Heat transfer from the reactor coolant system (RCS) to reactor building ambient.

Available Core Cooling Mode: Mini Decay Heat Removal (MDHR) system.

RCS Pressure Control Mode:

Standby Pressure Control System.

Major Parameters (as of 4:00 AM, May 20,1983) (app _roximate values)

Average Incore Thermocouples*:

91 F Maximum Incore Thermocouple *:

136 F RCS Loop Temperatures:

A B

Hot Leg 87*F 85 F Cold Leg (1) 73 F 74 F (2) 74*F 74 F RCS. Pressure:

64 psig Reactor Building: Temperature:

68 F Pressure:

-0.2 psig Airborne Radionuclide Concentrations:

2.7 E-7 uCi/cc H3 (Tritium)

(sample taken 5/17/83)

.1.0 E-9 uCi/cc particulates (predominately Cs-137)

(sample taken 5/17/83)

• Uncertainties exist as to the exact location and accuracy of these readings i

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