ML19351E348
| ML19351E348 | |
| Person / Time | |
|---|---|
| Site: | Yankee Rowe |
| Issue date: | 06/20/1969 |
| From: | YANKEE ATOMIC ELECTRIC CO. |
| To: | |
| Shared Package | |
| ML19351E347 | List: |
| References | |
| NUDOCS 8011280149 | |
| Download: ML19351E348 (8) | |
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j YANKEE NUCLEAR POWER STATION Regulatcfry Fife Cy.
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OPERATION REPORT NO. 101 l
l For the Month of I
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May 1969 l
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I Submitted by j
YANKEE ATOMIC ELECTRIO COMPANY l
Boston Massachusetts 1
June 20, 196o q
So i i z40 / 4 0 L
g This -report covers the operation of the Yankee Atomic Electric 9
Company plant at Rove, Massachusetts for the month of bby,1969 Plant lead at the start of the period was 16h.3 MWe; continued plant stretchout operation resulted in a load decrease to lh7 9 MWe at the end of the period.
There were no plant shutdowns during the month of May,1969 The first shipment of new fuel for Core VIII was delivered on-site, and consisted of eight assemblies.
The eighth vapor. container air charge surveillance period continued through the report period, during which Class B and Class C l
penetration leak test programs were initiated. At the end of the period, 4
sixteen mechanical system penetrations had been tested, successfully.
Leakage of air from the vapor container during the report period was normal.
All routine tests were completed, successfully. Results of a control rod exercise on May 1h showed No. T control rod suspect of being out of step. A further test of control rod Group B consisting of Rods No. 5, 6, 7, and 8, incorporating visicorder traces, confirmed that Rod l
No. 7 was four step increments belev Rods 5, 6, and 8.
Rod No. 7 was then l
moved outvard four steps. Visicorder traces of a subsequent Group B rod exercise showed No. 7 rod to be in proper alignment.
During the period, the primary to secondary leak rate increased 9
in the No. h steam generator vaa the major ~ contributor-to-this" leakage.
from 115 to 598 gallons per day. Measurements indicated.that tube leakage l
Plant Abnormal Occurrences There were no plant abno'emal occurrences during the month of May, 1969 Plant Load Reductions May 7 (1205-1301)
Load reduction to 133 MWe; turbine throttle valve monthly test.
May 9 (0100-0210)
Lead reduction to lh8 MWe due to electrical storm.
May 20 (1520-17h0)
Lead reduction to lh7 MWe due to electrical storm.
May 25 (1745-1825)
L ad redu ti ne t Ihh MWe due to electrical l
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May 29 (2025-2235) t Illl>
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.. l Plant Maintenance l
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The following is a list of pertinent maintenance items performed l
by the plant staff during the month ~of May, 1969 i
1.
The vapor container drain trip valve was lapped.
2.
Two'dovel bolts were fabricated to' facilitate reinstallation of steam generator primary cide manway covers.
3.
Hold-down bolts were fabricated for'the steam generator diaphragm seal veld cutter.
h.' The packing was replaced in No. 1 charging pump.
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'5 The two intake and one discharge valves in~the No. 2 waste gas compressor were replaced with a refurbished set cf valves.
l Instrumentation and Control l
The following is a list of pertinent lastrumentation and control maintenance items' performed by the plant staff during the month of May, 1969 Testing and installation of the fire detection system components l
9 1.
vas continued. Installation of the system pertinent to the switch-gear room has been completed.
2.
The incore instrumentation test program was continued.
j 3.
A chart timing device was installed on the pressurizer recorders.
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The plant THUR temperature channels were recalibrated.
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A semi-annual' operational test of the'two off-site standby air particulate monitors was per 'rrmed.
Reactor Plant Performance-The following parameters were determined by means of incore instrumentation:
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520 9 Wt; So5.60F Tavg; Control Rod Group A, B, C, D @
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90 3/8"; o ppm boron.
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q 4.64-Minimum DNBR
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9 551.0 F Maximum outlet. temperature.
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) Chemistry The main coolant ammonia concentration and pH averaged 11 9 ppm and 9 69, respectively.
The main coolant beta-gamma activity and crud level averaged 6.49 x 10-2.uc/ml and 0.06 ppm, respectively.
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The main coolant' tritium concentration averaged 5 31 x 10-1 uc/ml during the period.
The iodine - 131 specific activity was 2.81 x lt-5 ue/ml and l
the iodine 131/133 atomic ratio was 0.46, indicating the a.sence of detectable fuel defects.
A representative crud sample for the month, collected on May 23.- had the following radiochemical analyses:
dpm/mg crud Cr-51 Ih-Sh Fe-59 j
1 92 x 10T 1,hl x 107 1.25 x 107 i
Co-58 Co-60 Ag-110 T.12x10{
1.06 x 100 1 7h x 107 A main coolant gas sample collected on May 6, had the following radiochenical analyses: uc/cc gas Xe-133 Xe-135 Ar h1 4.47 x 10-3 1.01 x 10-2
-1,5h x 10-1 l
Health and Safety I
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The following radioactive vastes were shipped during the period:
-53 drums of lov level vaste containing a_ total activity of 512.6 me.
L 14 drums of high level vaste in a single shield cask, containing a total activity of 9.59 curies.
I Approximately 40 ft3 of expended ion exchange. resins in a single l
shielded inner container, containing a total activity of 59 curies.
Waste disposal liquid releases totalled 53,781 gallons containing
- 0.061 me of gross beta-gamma activity and 87;73 curies of tritium. Gaseous releases during the period to_talled 817 4 me of gross beta-gamma activity.
Secondary plant water discharged, totalled 352,600 gallons containing 6.0 me of gross teta-gamma activity and 21.98 curies of tritium.
A one day fire fighting demonstration - participation program was 9
conducted on-site May 21.>
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' Radiation exposure doses for Yankee plant personnel, as measured by film badge, for the month of May, 1969, sere as follows:
I Average accumulated exposure dose:
111 mrem j
Maximum accumulated exposure dose:
530 mrem Operations l
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Attached is a summary of plant operating statistics and a plot of daily average load for the month of May, 1969 l
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YANKEE ATOfUC ELECTRIC COMPANY - OPERATING
SUMMARY
May 1969 ELECTRICAL MONTH YEAR TO DATE l
1 Gross Generation KWH 115,991,100 605 h36,400 9,609,198,200 Sta. Service (While Gen. Incl. Lesses)
KWH 7,696,795 37,413,h90 632,007,7h9 Net Output KWH 108,29h,305 568,022,910 8,977,190,h51 Station Service 6.6h 6.18 6.58 Sta. Service (While Not Gen. Incl. Losses) KWH 0
799,hhh 27,083,094 Ave. Gen. For Month (74h.00)
KW 155,902 O
Ave. Gen. Running (744.00)
KW 155,902 PLANT PERFORMANCE Net Plant Efficiency 28.2h 28.96 28.k1 Net Plant Heat Rate btu /KWH 12,085 11,78h 12,012 l
Plant Capacity Factor 85.91 90.22 75 39 Reactor Plant Availability 100.00 95 20 84.h6 i
NUCLEAR MONTH CORE VII TOTAL Hours Critical HRS 744.00 9,215 98 64,323.ho Times Scrammed 0
2 57 Burnup O
Core Average MWD /MTU 773.37 10,698.65 Region Average MWD /MTU A (INNER) 827.807 11,2h0.102 29,09h.38 B (MIDDLE) 891.050 12,514.910 22,502.34 C (0 UTER) 635 390 8,577 757 8,577.76 D (ZIRCALOY) 76h.078 10,815 551 10,815 55 i
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