ML20132G903
| ML20132G903 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 09/23/1985 |
| From: | Travers W Office of Nuclear Reactor Regulation |
| To: | Harold Denton, Snyder B Office of Nuclear Reactor Regulation |
| References | |
| CON-NRC-TMI-85-073, CON-NRC-TMI-85-73 NUDOCS 8510020005 | |
| Download: ML20132G903 (5) | |
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,'t September 23, 1985 NRC/THI-85-013 MEM0 rat;DUM FOR:
Harold R. Denton, Ofrector Office of Huclear Reactor Regulation Bernard J. Snyder, Program Directt.7 Ti!I Progran Office FROH:
William D. Travers, Deputy Program Director THI Program Office
SUBJECT:
NRC THI PROGRAM 0FFICE WEEK!.Y STATUS REPDRT FOR SEPTEMBER 16, 1985 - SEPTEHBER 22, 1985 1.
PLANT STATUS The facility remains in long term cold shutdown with the Reactor Coolant System (RCS) vented to the reactor building atmosphere and the reactor vessel head and plenum assembly removed from the reactor vessel.
The plenum is on its storage stand in the deep end of the fuel transfer canal. A dam has been installed between the deep and shallow ends of the fuel cransfer canal. The deep eld is filled with water to a depth of about 20 feet (about 5 feet 4bave the top of the plenum).
The modified internals indexing fixture is installed on the reactor vessel flange and is flooded to elevation 327 feet 6 inches (151 feet above the top of the core region). The defueling platform is installed over the Internal Indexing Fixture in preparation for defueling.
e Calculated reactor decay heat is less than 12 kilowatts.
RCS cooling is by natural heat loss to the reactor building ambient atmosphere.
Incore thennoccuple readings range from 71*F to 89 F with an average of 79 F.
Average cold leg temperature is 53'F.
The average reactor building temperature is 56'F.
The reactor building airborne activity is 3.5 E-7 uC1/cc Tritiun and 8.9 E-10 uC1/cc particulate, predominantly Cesium 137, 2.
WASTE MANAGEMENT The Submerged Demineralizer System (SDS) was shutdown during this period.
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EPICOR II cocrunced processing batch 266 from Conder. sate Tant 1A 4 'p-(C0T-IA).
To date 49,955 gallons from this batch have been pl/ /
processed.
Total volume processed through SDS to date is 2,963,T 5 gallons, and the total volume processed through EPICOR II is 2,656,93/ gallons.
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.lierold R. Denton 2
Septenber 23, 1965 Gernar'd J.-Snyder
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3.
DOSE REDUCTION /DEC0dTfCIIHATION ACTIVITIES Decontamination activities are continuing on the 281' level of the auxiliary building.
Average general area radiation dose rate is 40 mren pe-hour on the 347' level of the reactor building and is 67 mrera per hour on the 305' level of this reactor building.
4.
NEW PIVER WATER SAMPLING POINT _
Since July 19, 1935, the EPA has sampled the Susquehanna River water prior to the water entering TMI. A one gallon saciple is taken over 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> by a matering puao at the inlet to the Unit I water pre-treu tent sys ten.
This one gallon sample is collected daily and dndlyZed. A portion is Composited With like quantities from the other six days of the week.
The sample will be used to verify the source of activity in the Till site outfall water sarples.
In the past somu radionuclides in the river water taken into the plant have caused concern until the source was detenained not to be TMI but due to an upstream medical adainistration.
S.
ENVIRONMENTAL h0NITORING US Environmental Protection Agency (EPA) sample analysis results show THI site liquid effluents to be in accordance with regulatory limits, NRC requireuents, and the City of Lancaster Agreement.
IMI water samples taken by EPA at the plant intake from the river consisted of seven daily coiiposite samples taken from August 31 to September 7, 1985. The garr.a scan for the seven d3y conposite was negative.
Daily composites for two samples taken between September 2 and 3 and September 5 and 6,1985 detected a trace of Iodine-131.
Till water samples taken by EPA at the plant discharge to the river consisted of seven daily ccaposite samples takco f rom August 31 to Septenber 7,1985. Two 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> conposite senples, one taken between September 2 and 3,1935 and the other taken between Septeuber 5 and 6,1935 each detected a trace of Iodine-131.
Essentially the same concentration of Iodine-131 was detected by the upstrean sampler.
This indicates that the Iodine-131 was taken into the plant from the river and the plant was not the source. No reactor related activity was detectid. The detected concentration of Icoine-131 was less than 1% of the NRC allowable linit for release to unrestricted areas.
The Lancaster water saople taken at the water works intake and analyzed by EPA consisted of a seven day composite sauple taken from September 1 to September 7,1985. A gama scan detected no reactor related radioactivity.
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Harold R. Denton 3
Septembar 23, 1935
- ---Bernard J. Snyder t;RC/TMI-85-073 The flRC outdoor airbarne particulate sampler at the Till Site collecte.d a sample between Septeuber 4 and Septenber 11,19d5. No reactor related raoicactivity was detected. Analysis showed Iodine-131 and Cesium-137 concentrations to be less than the luwer linits of detectability.
6.
REACTOR BUILDIfiG ACTIVITIES Dafueling Wci;er Cleanup System (DUCS) preoperational testing and modification continued.
Installation of cable tray shielding continued.
Preoperational testing of the reactor building sunp recirculation systen components is in progress.
The system is expected to be op2rable this week.
Work is in progress on the canister positioning systen and canister handling bridge.
7.
AUXILIARY AND FUEL HANDLIf1G BUILDING ACTIVITIES Installation of the DWCS continued. Partial OuCS turnover for processing RCS during early defualing is expected to be complet3d in October.
All four of the fuel canister storage racks nave been delivered to the THI site and inspected. Critical welds and those welds which would have engaged the dunnaga during shipping were examined on the l
fourth canister storage rack to be delivered onsite. Penetrant l
testing (PT) was ustd for exanination of the welds and revealed l
eight welds with identifiable defects.
However, some of these
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defects would have been discernible through visual exomination. GPU l
performed a visual exonination of all welds on the fourth rack delivered.
This examination revealed about 50 linear indications.
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Subsequent PT of about 10% of these linear _ indications did not reveal any PT indicatinns of cracking or any other deleterious l
cffects in the welds. The eight positive indications were ground in l
such a manner as to fully expose the defect.
The first rack delivered onsite was layed on its sice and internal l
walding was visually examined by an inspector crawling inside the l
affected modular cells. Two visual indications were noted but subsequent PT exanination revealed that the indications were not significant.
The third rack which has not snown anj indications of questionable welds is being prepared for installation in the "A" spent fuel pool.
The installation is tentatively scheduled for the week of Septenber 23, 1985.
Further examinations and evaluations are being performd.
A completion date to affect repairs has not been determined.
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sun NRC FORM 318 (10 80) NRCM O240 OFFICIAL RECORD COPY
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Harold R. Denton 4
Sep te:.:be r 23, 1935 Bernard J. Snyder fiRC/Till-85-073 8.
fiRC EVALUATIONS Ili PROGRESS Technical Specification Change Requests nu rinars 43, 49, and 50.
Recovery Oparations Plan Changa numers 29, 31, and 32.
Fuel Canister Technical Evaluation, Revision 1.
Defueling Satety Evaluation.
Application for seismic exemption.
SDS Technical Evaluation and System Description Update.
Core Stratification Sauple Safety Evaluation.
Heavy Load Handling Safety Evalu nion Repart.
9.
PUBLIC MEETiliG Tha next meeting of the Advisory Panel is scheduled for October 1935 in Harrisburg, Pennsylvania. Exact date and location tar this noeting will be anneunced at a later date.
Persons desiring the apportunity to speak before the Panel are asked to contact 11r. Thomas Smithgall at 717-2'31-1042 or write to him at 21"2
- 1arietta Avenue, Lancaster, Pennsylvania 17603.
ORIGINAL SIGNED BY Wancm D. Travers Willieu D. Travers Deputy Prograu Director Till Program Office 1
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Harold R. Denton- "
5 September 23, 1935 Bernard J. Snyder fiRC/THI-85-073 ItiTERflAL DISTRIBUTI0t; E00 OGC Office Directors Comissioner's Technical Assistants flRR Division Directors liRR A/D's Regional Administrators IE Division Directors TAS EIS T'il Program Office Staff (10)
PHS EPA DOE RI Division Directors Public Aff airs, RI State Liaison, RI Tf11P0 HQ r/f Tit! SITE r/f CEfiTPAL FILE ilRC PDR LOCAL PDR Tl11-2 Project Section File l
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