ML19351E327
| ML19351E327 | |
| Person / Time | |
|---|---|
| Site: | Yankee Rowe |
| Issue date: | 01/20/1970 |
| From: | YANKEE ATOMIC ELECTRIC CO. |
| To: | |
| Shared Package | |
| ML19351E326 | List: |
| References | |
| NUDOCS 8011280116 | |
| Download: ML19351E327 (7) | |
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YANKEE NUCLEAR POWER STATION p. -.. r. c..
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OPERATION REPORT NO. 108 Jor the Month of December 1969 I
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Submitted by YANKEE ATOMIC ELrCTRIC COMPANY Westboro Massachusetts January 20, 1970 i
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This report covers the operation of the Yankee Atomic Electric Company plant at Rowe, Massachusetts for the month of December,1969 During the period plant load varied between 184.6 MWe and 186.0 MWe as the circulating water inlet temperatures fluctuated between 42 F and 38 F.
i During the report period, the primary to secondary leak rate increased from 89 to 125 gallons per day.
Surveillance contiaued to indicate the No.1 steam generator to be the major source of leakage.
The second Core VIII air charge to the vapor container was in progress at the start of the report period and was terminated December 1.
Air leakage from the vapor container during December was normal.
During the monthly control rod exercise, rods No. 7 and Mr.18 inserted properly; however, they could not be withdrawn beyond 88 1/8 and 87 6/8 inches, respectively.
Rod 7 was inserted to the new rod bank positicn of 87 6/8 inches.
Plant Abnormal Occurrences There were no plant abnormal occurrences during the repor+ period.
Plant Load Reductions December k (1150-1350): Load reduction to 130 MWe for monthly turbine j
throttle valve test.
I Plant Shutdcwns 1
There were no plant shutdowns duru the month of December, 1969.
m Plant Mai ntenance The following is a list of pertinent maintenance items perforned by the plant staff during the conth of December, 1969 1.
A priming water supply line was installed for the gravity drain tank pumps.
2.
The mechanical seal packing, three plungers, and one valve spring were renewed in the No. 1 charging pump.
A new valve cover gasket was also instc.*d.
3.
Isolation valves were installed for the oil cooler regulators servicing the No.1 and No. 3 char ing pumps.
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The temperature indicator was replaced on the No. 1 right hand control air dryer; and two heaters were replaced in the No. 2 right hand control air dryer.
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5 A lubricat.on oil 1cw pressure alarm was installed on the No. 2 charging pump, cer;teting installation of such an alarm on all three charging pumps.
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O O Instrumentation and Control The fcllowing is a list of pertinent instrumentation and control maintenance items performed by the plant staff during the month of December, 1969 1.
Development was completed of an automatic recorder for control rod movement during rod exercise periods.
2.
Relocation of the low pressure cover gas system loop seal monitor, l
from the incinerator stack to the gas compressor room, was completed.
1 Reactor Plant Perfcrmance 1
The following parameters were determined by means of incore instrumentation:
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%.O Tavg; control Rod Group A @ 90
, B, C, D @
870,0 K4t ;
- 890 ppm boron.
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F = 2.2 q
F
= 2.1 AH Minimum DNER = 3.29 I
Maximum Outlet Tt ature = 595.6 i
Secondary Plant Performance i
Feedwater heater terminal differences were as follows :
No. 1 = T.1 F No. 2 = 11.7 F Ho. 3 = 5.9 F 1
i The Condenser performance was as follows:
185.8 MWe; 1.52" Hg. 3.P.;
589.6 MWt; bl.8 F C.W. in; TTD = 32.0 F; cleanliness factor = 61.3%.
Chemistry The main coolant coron concentration was decreased frcm 930 ppm to 811 ppa during the period te compensate for nonnal core depletion. The average main coolant pH vas 5.34.
The main coolar. 2 average gross beta-gamma activity and crud level were .5 x 10 ue/ml and 0.02 ppm respectively.
i The main coolant tritium concentrati an averaged 3.61 uc/ml during 4theperiod.
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~5 The average iodine-131 specific activi+" vas 2.4 x 10 uc/ml and the iodine 131/133 atomic ratio was 0.h6 indicating tne absence of detectable fuel defects.
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O O A representative crud sample for the month, collect.1 on Deceaber 15, had the following radiochemical analyses : dpm/mg crud.
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j Cr-51 Mn-Sh Fe-59 6
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3.59 x 10 T.11 x 10 3.31 x 10 Co-58 Co-60
^8-110M 4
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5 2.53 x 10 1.15 x 10 1.3T x 10 i
A main coolant gas sample collected on December 15 had the l
following radiochemical analyses: ue/cc gas
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Xe-133 Xe-135 Ar-kl
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9.28 x 10 1.06 x 10 h.42 x 10 Health and Safety Waste disposal liquid releases totalled 22,210 gallons containing 0.055 me of gross beta-gamma activity and 86.lh curies of tritium.
Gareous releases during the pe.-icd totalled 789.6 me of gross beta-gamma activity and 0.292 me of tritium. Secondary plant water discharged, totalled 233,111 gallons containing 2.90 cc of grcss beta-gamma activity and 48.08 curies of tritium.
Radiation exposure doses for Yankee plant personnel, as measured by film badge, for the centh of December,1969 vere as follows :
Average accumulated exposure dese:
62 mren Maximum accumulated exposure dose:
70h trem The Hovember,1969 Cperation Report No.107 stated that gaseous releases during the period totalled 263.1 me of gross beta-gamma setivity and 13 5 curies of tritium.
The latter value was in error and is herein corrected to read 13.5 cc of tritium.
Operations Attached is a summary of plant operating statistics and a plot of daily average load for the month of December, 1969 i
YAI;D r ATO!U 2 ELECTRIC COMPANY - OiERATIIiG SUb'RARY December 1969
-:LECTRICAL MONTH YEAR TO DATE Gross Generation KWli 337,9:41,600 J,21],896,700 10,p15,658,500 Sta. Service (While Gen. Incl. Losses)
KWii 8,119,806 75,hlo,605 670,00b,86h Net Output KWH 329,821,79h 1,136,466,095 9,5 b 5,65 3,6 ? 6 Station Service 5.87 6.22 6.56 Sta. Service (While Not Gen. Inc.l. Losses) KWii O
2,624,279 28,907,9'.9 Ave. Gen. For Month (7h4)
KW 185,ho5 Ave. Gen. Running (74h)
KW 385,ho5
'LANT PERFORMANCE i
Net Plant Efficiency 29.72 26.70 28.bl Net Plant Heat Rate btu /KWH 11,483 li,891 12,012 Plant Capacity Factor 97.73 75.33 Th.66 Reactor Plant Availability 100.00 83.40 83.86 I
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Hours Critical hrs 7hh 2,3 5 1f C 20h.95 Times Scrammed 0
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l Core Average FMD/fHU 876.96 2,518.13 i
Region Average LMD/MTU l
A (INNER) 808.91 2,551.35 22,h82.25 i
B (MIDDLE) 1,013.78 3,187.81 15,223.87 C (OUTER) 747.68 2,331.01 2,331.61 D (ZIRCALOY)
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