ML19351E319
| ML19351E319 | |
| Person / Time | |
|---|---|
| Site: | Yankee Rowe |
| Issue date: | 03/20/1970 |
| From: | YANKEE ATOMIC ELECTRIC CO. |
| To: | |
| Shared Package | |
| ML19351E318 | List: |
| References | |
| NUDOCS 8011280107 | |
| Download: ML19351E319 (7) | |
Text
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YANKEE NUCLEAR POWER STATION l
OPERATION REPORT NO. 110 For the Month of February 1970 i
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Submitted by YANKEE ATOMIC ELECTRIC COMPANY Westboro Massachusetts March 20, 1970 k[i 8011280
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This report covers the operation of the Yankee Atomic Electric ompany at Rowe, Massachusetts for the month of February, 1970.
During the period plant load varied between 183.6 MWe and 185.7 !Ge g
j as the circulating water inlet temperature fluctuated between 36 F and 33 F.
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During the report period, the primary to secondary leak rate increased from 162 to 240 gallons per day. Surveillance continued to indicate the No.1 steam generator to be the major source of leakage During the second Core VIII vapor container air leakage surveillance period, which was terminated February 2, normal leakage was experienced. The j
j tnird Core VIII surveillance period was in progress at the end of the report I
period.
One shipment of spent fuel containing a total of nine assemblies was made on February 20, which concludes the shipment of s;-
.t fuel removed during the Core VII-VIII refueling period. This fuel shipment was the 30th I
f in the series, bringing the number of assemblies shipped in the ten assembly I
cask to 280, and the total number of assemblies to date to 296.
Plant Abnormal Occurrences 1
l There were no plant abnormal occurrences during the report pericd.
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l Plant Load Reductions i
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February 5 (1200-134c):
Lead reduction to lh5 M'Je for check-out of the j
No. 3 main coolant loop flov instrumentation.
i February 6 (13h5) :
Load reduction to 140 ige due to failure of the No. 3 main coolant flow detector.
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Plant Shutdowns
{
Shutdown No. 10h-8-70:
2/7/70 - 2/8/70, plant shutdown for reactor l
operator training.
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Total outage time:
28 hours3.240741e-4 days <br />0.00778 hours <br />4.62963e-5 weeks <br />1.0654e-5 months <br />, 3h minutes.
j Plant Maintenance l
l The following is a list of pertinent maintenance items performed by the plant staff during the month of February, 1970.
1.
New Mechanical seal rings were installed in the No. 1 and No. 3 charging pumps. Two plungers were replaced in the No. 1 pump, and No. 3 pump was repacked.
l 2.
A tri-annual inspection was performed on the No. 2 service water pump.
No abnormal conditions were noted.
3.
Approximately one half of the tubes i-the main condenser East water box were cleaned with scraper plugs de ing the February 7-8 shutdown period.
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l Instrumentat'in and Control l
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The following is a list of pertinrnt instrumentation and control maintenance items performed by the plant staff during the month of l
February, 1970.
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~1.
The LVDT for the No. 3 main coolant loop flow transmitter was replaced during the February 7 - 8 shutdown period.
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2.
A calibration check was performed en the main coolant temperature
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channels.
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l Reactor Plant Performance The following parameters were determined by means of incore instrumentation:
585 tat; 526.8 Tavg; Control Rod Group A @ 8h, B, C, D @ 88 ;
605 ppm boron.
I 2.0 Q
=
l 2.1 F
=
AH 3.3 l
Minimum DNBR
=
-Maximum outlet temperature = 599.0 Secondary Plant Perr'ormance i
Feedvater hrater terminal differences were as follows:
6.0 F 12.9 F No. 3 5.h F No. 2
=
I;o. 1 =
=
The Condenner performance was as follows:
18h.9 ige; 1.30" Hg. B.P.-
585 !Gt; 36.4 F C.W. in; TTD = 29.5 F; j
cleanliness factor = 81.5hr..
Chemistry j
The main coolant boron concentration was decreased frm 632 ppm
.to 588 ppm during the period to compensate.for core depletion. The average i
main coolant pH vas 5.53.
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"'he agin coolant average gross beta-gamma activity and crud level l
- ue/ml and 0.03 ppm, respectively.
l were 8.96 x 10 I
i The main coolant tritium concentration decreased from 2.03 uc/ml at i,he start of the report period, to 1.83 ue/ml at the end of the month due to makeup and boron dilution water.
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The ave.uge iodine-131 specific activity was 2.34 x 10 ue/ml and the iodine 131/133 atomic ratio was 0.44 indicating the absence of i
i detectable fuel defects.
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i A representative crud sample for the month, collected on February 6, had the following radiochemical analyses: dpm/mg crud i
i cr-51 Mn-Sh Fe-59 6
6 6
8.66 x 10 1.77 x 10 2.65 x 10 l
co-58 co-60
^8-110M 6
6 5
l 8.72 x 10 3.23 x 10 3.11 x 10 A main coolant gas sample collected on February 10 had the following radiochemical analyses: uc/cc gas 4
Xe-133 Xe-135 Ar-h1 4
-3
-2 6.9h x 10 1,5g x 19 1.07 Health and Safetv 4
One shipment of spent fuel, containing a total activity of 13.05 megacuries, was made during the period.
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Waste disposal liquid releases totalled 58,000 gallons containing 0.03h me of gross beta-samma activity and 95.60 curies of tritium. Gaseous releases during the period totalled 2.05h curies of gross beta-gamma activity l
and 0.0h5 me of tritium. Secondary plant water discharged totalled 416,860 gallons containing h.2hh mc of gross beta-gamma activity and hh.72 curies i
of tritium.
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Radiation exposure doses for Yankee plant personnel, as measured by film badge, for the month of February,1970 were as follows:
Average accumulated exposure dose: 54 mrem Maximum accumulated exposure dose: 2h0 mrem j
Operations I
1 Attached is a summary of plant operating statistics and a plot of daily average load for the month of February, 1970.
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~j YANKEE ATOMIC ELECTRIC COMPANY - OPERATING
SUMMARY
February 3970 ELECTRICAL MONTH YEAR TO DATE Gross Generation KWH 117,310,000 25h,703,200 10,470,361,700 Sta. Service (While Gen. Incl. Losses)
KWH 6,993,126 15,115,570 685,120,434 Net Output KWH 110,316,874 239,587,630 9,785,2hl,266 g
Station Service 5
5 96 5.93 6.5h Sta. Service (While Not Gen. Incl. Losses) KWH 201,517 201,517 29,109,446 Ave. Gen. Running (643.43)
Kw 182,320 g
Ave. Gen. For Month (672) d 17h,568 PLANT PERFORMANCE Net Plant Efficiency 29.72 29.70 28.44 Net Plant Heat Rate btu /KWH 11,h83 11,491 12,000 Plant Cstpacity Factor 92.06 94.9h 75.04 1-'
Reactor Plant Availability 96.04 98.12 84.11 NUCLEAR MONTH CORE VIII TOTAL Hours Critical HRS 653.28 3,782.h5 69,602.23 Times Scrammed 0
1 59 Burnup O
Core Average MWD /MPU Thh.39 4,368.56 Region Average MWD /MTU A (INNER) 685.01 3,964.11 23,895.01 g'
B (MIDDLE) 847.74 5,038.11 17,074.17 W'
C (OUTER) 647.46 3,738.78 3,738.78 D (ZIRCALOY)
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