ML20238A400
| ML20238A400 | |
| Person / Time | |
|---|---|
| Site: | Pilgrim |
| Issue date: | 06/30/1974 |
| From: | BOSTON EDISON CO. |
| To: | |
| References | |
| NUDOCS 8708310060 | |
| Download: ML20238A400 (43) | |
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l I PILGRIM NUCLEAR GENERATING STATION Environmental Radiation Monitoring Program 4 SEMIANNUAL REPORT NO. 4 JANUARY 1, 1974 THROUGH JUNE 30, 1974 ISSUED: AUGUST 29, 1974 BY: NUCLEAR ENGINEERING DT3T. ENVIRONMENTAL SCIENCES GhCUP BOSTON EDISON COMPANY
I TABLE OF CONTENTS l l 4 Section Page ! 1 I. INTRODUCTION AND
SUMMARY
......................... 1 1 II. DESCRIPTION OF MONITORING PROGRAM................ 1 2 1 1 III. MONITORING DATA AND RESULTS...................... 3 ' A. Air Surveillance............................. 3 B. External Gamma Exposure Rates................ 3 :- C. Milk......................................... 4 D. Crops........................................ 4 E. Domestic and Recreational Water.............. 4 F. Precipitation................................ 5 j G. Seawater..................................... 5 H. Marine Life.................................. 5 I. Bottom Sediment.............................. 6 l l l l l l l l ii i
~
1 LIST OF ILLUSTRATIONS l Figure Page 1.- Location of Offiste Radiological Monitoring l Stations......................................... 7 i I
- 2. Location of Onsite Radiological Monitoring- i Stations......................................... 8 1
- 3. Aquatic and Terrestrial Surveillance Stations.... 9 l
- 4. Radioactivity in Air Particulate - East Weymouth (EW).................................... 10
- 5. Radioactivity in Air Particulate - Overlook ,
Area (0A)........................................ 11 l l \ i 6. Offsite Gamma Exposure Rates - East Weymouth (EW) { and South Plymouth (SP ) . . . . . . . . . . . . . . . . . . . . . . . . . . 12
- 7. Onsite Gamma Exposure Rates Overlook Area (OA) and Public Parking Area (PA)................ 13
- 8. Concentrations of Strontium-90 and Cesium-137 in Milk ( P 1 ymo u t h ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
- 9. Gross Beta Concentrations in Monthly Water l Samples from Little South Pond................... 15
- 10. Sampling Locations for Bottom Sediment........... 16 l
l \ l lii
i LIST OF' TABLES
)
Table Page 1 AIR PARTICULATE AND GASEOUS RADIOIODINE SURVEILLANCE STATIONS............................ 17 l 2 EXTERNAL GAMMA EXPOSURE SURVEILLANCE STATIONS (TLD)............................................ 18 3 TERRESTRIAL AND AQUATIC SURVEILLANCE STATIONS.... 19 4 TYPES AND FREQUENCIES OF ANALYSES . . . . . . . . . . . . . . . . 20 5 ENVIRONMENTAL SAMPLE ANALYSIS PARAMETERS......... 21 6 AIR PARTICULATE -. GROSS BETA CONCENTRATIONS IN WEEKLY SAMPLES (pCi/m3)...................... 22 7 AIR PARTICULATE - GROSS GAMMA CONCENTRATION IN MONTHLY COMPOSITES ( cpm /m 3 x 10 - 3 ) . . . . . . . . . . . . . . . 23 9 PARTICULATE IODINE-131 IN AIR SAMPLES (pCi/m3)... 24 l 8A GASEOUS IODINE-131 IN AIR SAMPLES (pCi/m3 ) . . . . . . . 25 9 EXTERNAL GAMMA EXPOSURE RATES, JANUARY-JUNE 1974 (p R/ hr ) ( a ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 l l 10 RADIONUCLIDES CONCENTRATIONS IN MILK (pCi/l)...... 27 i 4 1 1 11 RADIOACTIVITY IN CROPS.... ...................... 28 12 RADIOACTIVITY IN DOMESTIC AND RECREATIONAL WATER. 29 13 RADIOACTIVITY IN PRECIPITATION - PLYMOUTH MASSACHUSETTS.................................... 30 14 RADIOACTIVITY IN SEAWATER........................ 31 15 RADIOACTIVITY IN MARINE LIFE..................... 32 15A RADIOACTIVITY IN MARINE LIFE..................... 34 16 RADIONUCLIDES IN BOTTOM. SEDIMENT................. 35 A-1 SEMIANNUAL
SUMMARY
OF RADIOACTIVE LIQUID EFFLUENTS JANUARY-JUNE, 1974..................... A-1 A-2 SEMIANNUAL
SUMMARY
OF RADIOACTIVE GASEOUS EFFLUENTS JANUARY-JUNE, 1974..................... A-2. I iv
i I. INTRODUCTION AND
SUMMARY
l The Operational Environmental Radiation Surveillance Program continues to be conducted in accordance with the specifications of the Pilgrim Station Operating License. The reactor was shut down during the entire reporting period for refueling and mainte-nance and for contested licensing hearings regarding a change in fuel design. As a result, gaseous effluent releases were very low and direct radiation from the facility was exceedingly small.
]
The gaseous Iodine -131 release for January, highest of the semi- j annual period, was only about 1.5 percent of the release limit.* l Due to the increased in-plant maintenance activity, the liquid effluent releases were higher than during normal operation.** This fact, coupled with intermittent operation of the circulat.ing 1 (dilution) water pumps, resulted in radionuclides buildup in the discharge canal. The highest level of 5.2 pCi Co-60 per gram i I sediment was detected in the clay found on the rocks at the sides J of the canal. The Co-60 activity level decreased to 0.14 pCi/gm l adjacent to the end of the canal and 0.05 pCi/gm 400 feet north-west of the canal. No activity was detected southeast of the station (MDA = 0.01 pCi/gm). The other media samples showed only radioactivity from natural sources and fallout from the Chinese nuclear weapon test of December 1973. No plant-related nuclides were detected in these media.
- Radioactive effluent releases are summarized in the Appendix.
o* Details of plant operation can be found in a separate report entitled, " Operating and Maintenance Semiannual Report #4." l i
II. DESCRIPTION OF MONITORING PROGRAM
\
The Environmental Radiation and Radioactivity Surveillance Pro- l gram is being performed in accordance with the requirements , l specified in the Pilgrim Facility Operating License (DPR-35). Summaries of the sampling media, locations, frequencies of collection and analyses are given in Tables 1 through 4. Details of the sampling program are given in Semiannual Report #2.* Sampling locations are shown in Figures 1, 2, and 3. The radio-analysis of environmental samples is being performed i by Interex Corporation. The limits of detection associated with 1 their analytical procedures are given in Table 5. Samples of bottom sediment and selected marine life were analyzed by Teledyne Isotopes using Ge (Li) gamma spectrometry.
~
The sensiti-vities of their analyses are given with the results in the appro-priate tables. CPilgrim Nuclear Generating Station, Environmental Radiation Monitoring Program, Semiannual Report #2, August 29, 1973. 2
III. MONITORING DATA AND RESULTS The results of environmental radiation and radioactivity measure-ments performed during the semiannual reporting period (January 1 1 to June 30, 1974) are presented in Tables 6 through 16 according i to sampling media and analyses performed. Results for each sampling media are discussed below. All sample analyses indicated l as incomplete will be reported in a later report. l A. Air Surveillance Air particulate analyzed for gross beta radioactivity increased over background levels due to the Chinese nuclear weapon test of December 1973 (Table 6). Figures 4 and 5 show the gradual in-crease in air particulate radioactivity since the test. Gross I gamma activity, obtained from integrated gamma spectra on monthly composites similarly increased (Table 7). Radiciodine levels remained less than the detection limits of 1 pCi/m3 The results 1 of the radiciodine analyses of the particulate pre-filters and j iodine filters are given in Tables 8 and 8A respectively. In January, the barium-impregnated felt iodine filters were replaced I with activated-charcoal impregnated felt filters to improve the collection efficiency for gaseous iodine. B. External Gamma Exposure Rates The environmental gamma exposure rate measurements from January to June 1974 are given in Table 9. The reported rates include the inherent dosimeter self-irradiation which is typically 6 to 8 microroentgens per hour ( R/h). The data for April was invali-dated by an inadvertent exposure of the samples to a source which occured during our contractor's relocation to new laboratories. The April data is not used in averaging the six month exposure rate nor is it shown in Figures 6 and 7 which present measured exposure rates at two offsite and two onsite locations, 3 ________w
respectively. No direct rad 3ation from the turbine was detected i as the reactor was in a cold shutdown mode throughout the i reporting period. I l The previous Semiannual Report (#3) erroneously reported an average dose of 4.4 x 10-3 mrem to 57,000 visitors. The correct values are 3.3 x 10-3 mrem to 75,000 visitors. All other values are unchanged. ) I C. Milk Milk was sampled from three locations and was analyzed monthly 1 for Cs-137, Sr-90, Ba/La-140 and I-131. The detection sensitivity, for I-131 was reduced from 5 pCi/l to 2 pCi/1 and January. The analysis now utilizes an ion exchange column and low-level beta counting. The results obtained during the reporting period are l presented in Table 10. Preoperational and operational levels of strontium and cesium in Plymouth milk are shown in Figure 8. 1 i D. Crops No crop samples in the vicinity of the station were obtainable during the reporting period. Table 11 gives the results reported as incomplete in the previous Semiannual Report (#3). Activi-ties were found not to be in excess of background values. E. Domestic and Recreational Water Monthly composites of weekly water samples were analyzed for gross radioactivity and the isotopes H-3, Sr-90 and I-131 and the results are shown in Table 12. Figure 9 shows a gradual increase in gross beta activity during the reporting period. This is consistent with the increase in radioactivity in air particulate due to fallout from the December Chinese nuclear weapon test. 4
F. Precipitation A precipitation collection station in Plymouth was sampled during i the reporting period. The radioactivity found in the monthly I samples in reported in Table 13. Fallout again was evident in the results. G. Seawater , 3 1 Monthly samples were taken from the intake channel, discharge ] channel, and a control location 7.5 miles NNW of the : cation. These were analyzed for fractional gross beta (explained in Table 14), gross gamma, tritium and iodine-131. The results of these analyses and of quarterly composites from the intake and I discharge channels are given in Table 14. The values which are ) greater than the detection limit are within the range of pre- ; operational values. H. Marine Life 2 An accelerated mollusk sampling program was initiated in March of the reporting period to provide increased data on radioactivity in mollusks. Although the radiochemistry results are incomplete, it appears that no plant-related nuclides are present in clams (mya and ensis) or mussels in Plymouth Harbor, Duxbury Bay or Manomet Point. The results of these and other marine life samples are shown in Table 15. The completed results from the last reporting period are presented in Table 15A. To shorten the time required for analysis of marine life samples, more use .will be made of gamma spectral analysis. Data already obtained in this way is included in Table 15. In an effort to radioanalyze the benethic organisms at Rocky Point, cod viscera (stomach, intestine, etc.) were analyzed separately in one sample. Since cod is a bottom feeder, the 5
l organisms consumed are concentrated in the viscera. The low gross gamma results is an indication of no unusual radioactivity. j 1 l I. Bottom Sediment 1 The increased liquid discharges during the reporting period caused elevated levels of radioactivity in bottom sediment in ) the immediate vicinity of the discharge canal. The sampling l locations are shown in Figure 10, and the activity levels found at those locations are given in Table 16. The highest levels l l were found in clayey sediment on the edges of the discharge canal (Point #4). Activity was found to decrease rapidly with distance from the discharge canal. An estimate was made of the direct radiation l dose to shorefront visitors. The model used was the HERMES computer code
- for a contaminated river bank. Using the highest concentrations found of Co-60, Co-58 and Mn-54, an exposure rate of 0.002 mR/hr at the bank of the canal is calculated. Assuming each of the 33,300 visitors to the shorefront remained at the canal's edge for one hour, maximum population dose of 0.066 l person-rem is estimated.
- Fletcher, J.F. and W.L. Datson, Hanford Engineering and Develop-ment Laboratory, TME-71-168, UC-80.
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i TABLE 3 TERRESTRIAL AND AQUATIC SURVEILLANCE STATIONS Refer to Distance and Direction Fig. 3, Sample Type Sample Location From Station Item No. Milk Plymouth Count (CF) 3.5 miles W 13 Local store (a)y Farm --- Bridgewater State Farm (BF) 20 miles W 16 Cranberries Beaver Dam Road Bog 2 miles S 7 i Robbins Bog (RB) 2 miles SSE 8 l Bartlett Road Bog (BR) 2.75 miles SSE-S 10 Crops (potatoes, Plymouth County Farm (CF) 3.5 miles W 13 cabbage, lettuce Manomet (RF) 2 miles SS9 9 and hay) Bridgewater State Farm (BF) 20 miles W 16 Precipitation South PlymouthI ") 4.75 miles WSW-W 14 Domestic and Deep Water Pumping Station 4.75 miles W 12 recreational water (Lout Pond Well and Little South Pond)--Plymouth (LW) Warner's Pond Pumping Station 2.75 miles SSE 11 Manomet Well (MW) Great Pond Pump pg Station 24 miles WNW-NW 17 South Weymoyt (GP) College Pond tap DJ(CP) 6.5 miles SW 15 Seawater Discharge channel (DC) Onsite 1 Cooling water intake (IC) Onsite 2 Priscilla Beach (PRD) 0.8 to 1.6 miles ESE-SE 5 White Horse Beach (WHB) 1.6 to 2.7 miles ESE-SE 6 Plymouth Beach (PLB) 3.5 miles WNW 4 Powder Point - Duxbury (PP) 7.5 miles NNW 3 Marine life Marine waters in station Sampling ranges from - (lotster, fish, vicinity 2.4 miles W-WNW to mollusks) 2.9 miles ESE-SE Dottom sediment Area in vicinity of dischargo - channel outfall (a) Additional stations operated during reporting period although not required by operating license. (b) Contral station. 19
TABLE 4 TYPES AND FREQUENCIES OF ANALYSES Planned Sample Type Frequency of and Number Analysis Analysis Collection Type Air Particulate (11) Gross beta Weekly Continuous Gross gamma on filter composites from each station Monthly Gamma spectrum (a) 1-131 Weekly Gaseous iodine (11) I-131 Weekly Continuous Gamma exposure (39) Dosimeter reading Monthly Continuous Domestic water (5) Gross beta and gross gamma Monthly Grab Gamma spectrum (a) I-131, Sr-90, H-3 Monthly Precipitation (1) Gross beta and gross gamma Monthly Continuous Gamma spectrum (a) I-131, Sr-90, H-3 Monthly
. Seawater (3) Fractional gross beta and gross gamma Monthly Continuous (DC)*
Gamma spectrum I-131 Monthly Grab (others) Sr-90, Cs-137, H-3, Mn-54, 2n-65, Co-58, and Co-60 Quarterly Marine life (c) Gross beta and gross gamma Each sample Gamma spectrum (b) 1-131, Sr-90, Cs-137, Mn-54, Zn-65, Co-58, and Co-60 Each sample Bottom sediment (2) Gross beta, gross gamma, and gamma spectrum Semiannually Grab Milk (3) I-131, Sr-90, Cs-137, Ba/La-140 Monthly Crops Gross beta, gross gamma, and gamma spectrum Annually Sr-90, Cs-137 Annually (a) Selective gamma analysis will be made based on gross gtmma results, with at least one gamma spectrum analysis made each quarter. (b) A gamma spectrum analysis will be made at least once during each sampling period. (c) Samples will be collected during their commercial harvesting season. DC = discharge channel. 20
TABLE 5 ENVIRONMENTAL SAMPLE ANALYSIS PARAMETERS Sample Type Analysis Detection Limit Aliquot LError Air Particulate Gross beta 4 x 10" pCi/m 10,800 ft 110
-3 cpgj ,3(a) 10,800 ft 3
. , Gross gamma 2 x 10 110 131 10,800 ft 3 l 1 1 pCi/m +10 1 1 Nonsaline Water Cross beta 1 pCi/ liter 1,000 ml 110 Gross gamma 5 epm / liter (c) 4,000 ml +10 l Ganima spectrum (d) 4,000 ml O Sr 0.5 pCi/ liter 1,000 mi +15 3 H 2.5 pCi/mi 4 ml +10 Crops and Gross beta 0.2 pCi/g 20 g +10 Gross gamma 0.01 cpm /g (c) 1,000 g 10 Gamma spectrum (d) 1,000 g 90 Sr 0.005 pCi/g 100 g 110 1#Cs' 13 Cs 0.1 pCi/g 100 g 120 Mn 0.1 pCi/g 100 g 120 58 Co 0.1 pCi/g 100 g +20 60 ' Co 0.1 pCi/g 100 g 120 2n 0.1 pCi/g 100 g +20 Seawater Gross beta 60 pCi/ liter 30 g 120 Fractional gross beta 5 pCi/ liter 500 ml 120 Gross gamma 5 cpm /litor(c) 4,000 ml 110 Gamma spectrum (d) 4,000 ml H 2.5 pCi/ml 4 ml 110 90 Sr 0.5 pCi/ liter 15,000 ml +15 Cs 0.05 pCi/ liter 15,000 ml 15 54 Mn 5 pCi/ liter 1,000 ml 120 58 0o 5 pCi/ liter 1,000 ml +20 60 Co 5 pC1/ liter 1,000 ml 20 65 Zn 5 pCi/ liter 1,000 ml 120 131 I 5 pCi/ liter 1,000 ml 115 Sr 0.5 pC1/ liter 1,000 ml +15 Cs 1 pCi/ liter 1,000 ml 15 140 Ba 5 pCi/ liter 1,000 ml 15 131 I 2 pCi/ liter 2,000 ml [25 Bottom Sediment Gross beta 2 pCi/g 1g 115 Gross gamma 0.02 cpm /g 1,000 g 110 90 Sr 0.005 pCi/g 100 g +20 Background Gamma exposure 1 FR/hr 1-month ~+10 Radiation ra te (a) exporure NOTE: Provided by Interex Corp. , Natick, Massachusetts (a) Measured with thermoluminescent dosimeter. (b) In the counter used, 1 cpm corresponds to 2.2 pCi of 337 Cs. (c) In the counter used, 1 cpm corresponds to 9 pCi of 137Cs. (d) Sensitivity. depends on the specific nuclide and the presence of interfering nuclides. A typical sensitivity is 30 pCi/ sample counted. 21
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TABLE 9 EXTERNAL GAMMA EXPOSURE RATES, JANUARY-JUNE 1974 ( R/hr)("} i Onsite Monitoring Locations January February March April (,) May June Average Overlook Area (OA) 17.5 17.3 17.6 18.9 16.4 15.7 16.9 Public Parking Area (PA) 15.7 16.5 16.6 19.7 15.8 16.0 16.1 Pedestrian Bridge (PD) 15.0 20.8 (b) 17,1 30.3(b) 15.6 2 0. 0 (b) 17,7 Rocky Hill Road (A) 14.8 15.1 16.2 18.0 (c) 15.2 15.3 Rocky Hill Road (D) 16.4 17.2 17.8 18.2 17.8 17.0 17.2 East Breakwater (EB) 15.8 17.8 16.2 23.8 17.1 18.4 17.0 Microwave Tower (M?) 16.4 16.7 17.6 21.1 17.7 16.9 17.1 Property Line (C) 16.0 16.1 17.2 24.6 17.3 17.0 16.7 l Property Line (HB) 17.0 18.0 18.1 21.4 17.6 17.0 17.5 Property Line (WH) 14.9 16.6 20.0 24.1 19.6 15.9 17.4 Property Line (EM) 16.1 16.5 17.3 26.3 16.7 15.9 16.5 Property Line (E) 16.9 15.4 (c) 16.1 (c) 15.0 15.6 Property Line (H) 16.1 16.6 17.6 19.1 17.8 16.9 17.0 Property Line (G) 12.2 14.7 13.1 17.6 13.2 14.9 13.6 Property Line (I) 15.7 17.2 17.1 18.6 17.4 16.5 16.8 Property Line (F) 16.2 17.1 17.6 19.8 17.4 17.5 17.2 , Property Line (D) 14.4 16.3 15.6 22.1 15.4 16.0 15.5 ! Property Line (J) 15.4 15.4 16.5 17.0 17.2 15.5 16.0 Property Line (K) 15.5 15.5 16.9 17.3 17.1 14.8 16.0 Property Lino (L) 14.8 18. 6 (b) 15.6 28.6(b) 16.4 17. B (b) 16.6 Property Lino (PL) 18.3 16. 4 (b) 16.3 23.2(b) 17.2 15.8(b) 16.8 Warehouse (WS) 15.5 15. 6 (b) 14.2 20.0(b) 15.6 15.0 (b) 15.2 Average Onsite Dose Rate . per Month 15.8 16.7 16.8 21.2 16.8 16.4 16.5 offsite Monitoring Locations East Weymouth (EW) 12.8 16.8 18.9 20.8 13.3 15.8 15.5 Kingston (KS) 15.6 16.5 16.7 25.4 16.8 15.7 16.3 sagamore (CS) 15.8 17.7 17.2 24.8 16.6 16.7 16.8 Plymouth Airport (SA) 11.8 14.0 13.3 18.4 13.6 15.6 13.7 Duxbury (SS) 14.7 15.3 15.7 18.1 16.3 14.9 15.4 Plymouth (CP) 16.2 16.8 16.5 23.9 (c) 16.0 16.4 North Plymouth (NP) 15.9 16.7 16.2 20.2 17.1 If.3 16.4 Plymouth Center (PC) 12.1 13.2 13.3 20.0 13.4 12.7 12.9 Jouth Plymouth (SP) 16.0 16.4 16.9 20.1 15.1 16.1 16.1 Manom,t (MB) 15.0 15.7 15.9 22.5 15.2 14.6 15.3 Manomet (MS) 17.2 17.1 17.6 20.7 16.8 16.7 17.1 Manomet fME) 17.6 18.2 18.9 24.0 18.5 18.0 18.2 Manomet (MP) 12.5 15.9 13.3 20.9 13.1 15.3 14.0 Cleft Rock Area (CR) 15.0 17.1 17.0 24.3 16.8 15.9 16.5 Rocky Hill Road (ER) 16.8 16.0 18.0 23.3 17.4 17.1 17.1 Bayshore Olive (BD) 17.8 18.6 (d) 28.4 17.8 17.7 18.0 Rocky Hila Road (WR) 15.7 16.5 17.1 18.6 (c) 16.0 16.3 Average Offsite Dose Rate per Month 15.2 16.4 16.4 22.0 15.8 15.9 15.9 (a) Gross txposure Rates which include inherent dosimeter background dose rates. Measured with CaF2 (Mn) dosimeters (EC&G TL-15). (b) New dosineter - not normalized. (c) Dosimeter atolen. (d) Reading lost in readout. (e) April readings invalii ted (22e text), not used in average. 26
TABLE 10 RADIONUCLIDES CONCENTRATIONS IN MILK (pCi/1) Collection Plymouth Analysis Periot _ (County Farm) Bridgewater Local Store j Cs-137 Dec 7. 0 +1. 0 (a) 6.5 +0.6 8.9 +0.9 Jan 21 +2- 15 +1~ 12 +1~ f Feb 6.9 +0.7 5.3 40.6 6.9 +0.7 Mar 11 +1- 12 +1- 12 +1-Apr T(b) T 11 T_1 May I I I l June I I 22 +2 r Gf-90 Sep 9.2 +0.9 (a) 4.8 +0.5 5.9 +0.5 Oct 7. 5 T1. 2 (a) 6. 3 T0. 6 (a) 3. 7 70. 5 (a) Nov 10. 0 T1. 0 (a ) 11. 0 T1. 0 (a) ll.0'T1.0(a) Dec 4. 8 T0.5 (a) 7. 9 T0. 8 (a) 5.3 TO.5 Jan 7.0 70.5 8.4 TO.5 5.1 70.6 Feb 5.9 70.6 6.6 T0.5 3.0 70.5 Mar 6.1 T0.8 6.4 T0.8 4.5 T0.8 Apr I ~ 12,4 70.9 13.1 T0.9 May I I I June I I I I-131 Jan <2 <2 <2 . I Feb <2 <2 <2 Mar <2 <2 <2 Apr <2 <2 <2 May <2 <2 <2 June <2 <2 <2 Ba/La-140 Jan I I I Feb I <5 I l Mar <5 <5 <5 Apr <5 <5 <5 May I I I
. Tune I I I (a) Data listed as incomplete in previous report.
(b) I indicates incomplete analysis; value to be reported in next semiannual report. 27
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TABLE 12 RADIOACTIVITY IN DOMESTIC AND RECREATIONAL WATER l I i Collection Great Little College Lout Pond Manomet Analysis Date ' (197 4 ) Pond South Pond Pond Well Well Gross Jan 6.6 +1.0 3.1 +1.0 3.6 +1.0 1.7 +1.0 <1.0 Beta Feb 5.9 T1.0 1.7 T1.0 1.8 T1.0 <1.6 1.3 +1.0 : (pci/1) Mar 14.0 ~2.0 3.8 T1.0 7.4 71.0 2.0 +1.0 <l.6 Apr 7.0 T1.0 5.0 71.0 4.0 T1.0 1.5 T1.0 2.3 1 1.0 May 4.9 71 <l.6 <l.6 <l.6 <l.0 June I(c) I I <l.C <l.0 . Gross Jan <5 <5 <5 <5 <5 Gamma Feb <5 <5 <5 <5 <5 (cpm /1) Mar <5 <5 <5 9 +5 <5 , Apr <5 <5 <5 <5 8 +5 ! May e5 <5 <5 <5 <5 j June <5 <5 <5 <5 <5 Strontium-90 Nov 1973 2.3 +0.5 1.1 +0.5 1.4 +0.5 < 0. 5 (b) < 0.5 (a) 1 (pC1/1) Dec 1973 0.7 70. 5 (a) 0. 9 70.5 (a) 0.6 70.5 (a) < 0. 5 (b) < 0.5 (b) 1 Jan 0.6 T0.5 0.7 70.5 0.6 70.5 <0.5 <0.5 Feb 1.1 70.5 0.8 70.5 0.7 70.5 <0.5 <0.5 Mar 0.6 70.5 <0.T 0.6 70.5 <0.5 0.6 +0.5 Apr I~ 1.0 +0.5 I~ <0.5 <0.T May <0.5 <0.5 <0.5 <0.5 <0.5 .I June I I I I I l Tritium Jan <2.5 <2.5 <2.5 <2.5 <2.5 (pCi/1) Feb <2.5 <2.5 < 2. 5 <2.5 <2.5 Mar <2.5 <2.5 < 2. 5 <2.5 <2.5 Apr <2.5 <2.5 < 2.5 <2.5 <2.5 May <2.5 <2.5 < 2. 5 <2.5 <2.5 June I I I I I Iodine-131 Jan <5 <5 <5 <5 <5 (pCi/1) Feb <5 <5 <5 <5 <5 Mar <5 <5 <5 <5 <5 Apr <5 <5 <5 <5 <5 May <5 <5 <5 <5 <5 June <5 <5 <5 <5 <5 (a) Data listed as incomplete in previous report. (b) Data listed incorrectly in previous report. . (c) I indicates incomplete analysis; value will 5" reported in next semianc.Jal report. 29
l i TABLE 13 l l RADIOACTIVITY IN PRECIPITATION - PLYMOUTH MASSACIIUSETTS ("} l l 1 Gross Gross ' Collection Beta Gamma Sr 90 H3 Feriod (1974) (pci/m2) (cpm /m2 ) (pci/m 2) (pCi/m2) January 300 1100 <120 50 140 I Febrt.ary 160 140 230 1120 40 130 I March 1740 170 120 1120 90 150 I April ID) I 1900 1190 I I May 560 1120 500 1120 I I June I I I I (a) Analysis not required by operating license. (b) I indicates incomplete analysis, l, i l i I 30
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i 1 I APPENDIX l SEMIANNUAL
SUMMARY
OF l RADIOACTIVE EFFLUENTS l 4 I l
'1 1
- I l
l 1
--.-._--w
TABLE A-1 SEMIANNUAL
SUMMARY
OF RADIOACTIVE LIQUID EFFLUENTS JANUARY-JUNE, 1974 Jan Feb Mar Apr Mag June Total
- 1. Cross Radioactivity (a) Total Released (C1) 6.78E-1 1.08E0 7.54E-1 5.14E-1 2.76E-1 4.83E-1 3.79E0 (b) Avg Conc Released (pCi/ml) 9.50E-8 3.12E-7 3.43E-7 3.86E-7 2.71E-7 1.52E-7 2.07E-7 (c) Max conc Released (pCi/ml) 2.03E-7 2.28E-6 1.17E-6 1.10E-6 1.09E-6 1.00E-6 2.28E-6
- 2. Tritium (a) Total Released (C1) 3.53E0 2.59L0 1.90E0 1.01E0 5.46E-1 7.22E-1 1.03E1 (b) Avg Conc Released ( Ci/ml) 4.94E-7 7.55E-7 8.64E-7 7.59E-7 5.35E-7 2.28E-7 5.63E-7
- 3. Dissolved Noble Cases (a) Total Released (C1) * * * * * * *
(b) Avg Cone Released ( C1/ml)
- 4. Cross Alpha Radioactivity' (a) Total Released ( 1) 5.80E-5 2.75E-4 3.00E-4 2.32E-4 5.92E-4 8.77E-3 1.02E-2 (b) Avg Conc Released ( Ci/ml) 3.17E-12 1.50E-11 1.64E-11 1.27E-1). 5.80E-10 2.77E-9 5.57E-10
- 5. Volume of Liquid %arte to Discharge Canal (Liters) 2.52E6 1.62E6 1.58E6 1.01E6 6.5E5 1,11E6 8.50E6
- 6. Volume of Dilution Water (Liters) 7.14E9 3.43E9 2.20E9 1.33E9 1.02E9 3.17E9 1.83E10 7 Isotopes Released (C1)
Chromium-51 3.02E-2 6.51E-3 5.21E-2 7.27E-3 1.79E-3 9.79E-2 Manganese-54 3.53E-2 4.70E-2 4.60E-2 5.35E-2 4.04E-2 2.97E-2 2.52E-1 Cobalt-58 4.28E-2 4.86E-2 1.17E-1 3.74E-2 2.60E-2 1.59E-2 2.88E-1 Iron-59 8.97E-3 1.34E-2 2.24E-2 Cobalt-60 6.55E-2 1.15E-1 3.29E-1 1.52E-1 1.19E-1 1.15E-1 8.96E-1 Zine-65 4.03E-3 7.78E-3 1.07E-2 7.68E-3 1.22E-2 6,77E-3 4.92E-2 Strontium-89 2.12E-3 1.33E-3 1.58E-3 1,52E-3 2.70E-4 7.55E-5 6.90E-3 Strontium-90 2.77E-4 3.08E-4 6.J2E-4 6.46E-4 1.05E-4 6.44E-5 : .03E-3 Antimary-124 1.36E-3 1.31E-4 1.07E-3 7.17E-4 5.40E-4 3.82E-3 lodine-131 9.07E*2 6.56E-3 9.73E-2 Cesium-134 8.06E-2 1.78E-1 4.71E-2 5.76E-2 2.04E-2 6.47E-2 Cesium-137 4.48E-1 2.27E-1 6.16E*1 1.45E-1 1.82E-1 5.56E-2 2.28E-1 1.45E0 Barium /Lan thanum-140 5.60E-5 5.60E-5 Neptunium-239 4.17E-4 4,17E-4 Unidentified 9.81E-2 4.44E-2 4.03E-3 1.40E-2 1.35E-4 2.28E-2 1.83E-1
- 8. Percent of Tech Spec Limit for Total Activity Released ** - -
25.12 - - 12.73 18.95
*No detectable activity
- Based on 10 C1/ quarter limit I
s A-1
'l l
31AJ3ILI 11 - 2 l l l SEMIANNUAL
SUMMARY
OF RADIOACTIVE GASEOUS EFFLUENTS JANUARY-JUNE, 1974 I i l Jan Feb Mar Apr Mav June Total
- 1. Total Noble Gases (C1)
(a) Main Stack 4.63E0 *-2 *-2 *-2 *-2 *-2 4.63E0 (b) Reactor tailding Vent 8.64E1 1.24E2 1.22E2 1.22E2 8 . ,4 4 E1 6.*7El 6.03E2
- 2. Total Halogens *-1 (CL)
(a) Main Stack 3.65E-5 *-2 *-2 *-2 *-2 *-2 3.65E-5 j (b) Reactor Building Vent 2.392-3 4.29E-4 1.04E-5 *-3 *-3 *-3 2.83E-3 i
- 3. Total Particulate Gross Beta-Gamma Radioactivity *-1 (C1)
(a) Main ftack 1.47E-6 *-2 *-2 *-2 *-2 *-2 1.47E-6
-(b) Reactor Building vent '1.89E-3 4.49E-4 3.73E-4 2.66E-4 1.85E-4 6.99E-4 3.86E-3
- 4. Total P' articulate Gross Alpha Radioactivity (C1)
(a) Main Stack 2.42E-8 *-2 *-2 *-2 *-2 *-2 (b) Reactor Duticing vent 2.40E-7 *-4 *-4 6.12E-8 *-4 *-4
- 5. Total Tritium (C1)
(a) Main Stack 1.40E-2 *-2 -2 *-2 *-2 *-2 1.40E-2 (b) Reactor Building 5.nt 4.96E-1 1.10E0 2.44E-1 1.08E-1 1.10E-1 f.25E-2 2.08E0
- 6. Maximum 24-hr Noble (Date) 1-2 2-21 3-2b 4-19 5-16 6-7 Gas Releases (Ci) 8.52 5.14 4.56 4.08 3.37 2.62 7 Percent of Applicable Limit for j Noble Gases 0.03 0.05 0.05 0.05 0.03 0.03 0.04 !
- 8. Percent of Applicable Limit for l
} Halogens and Particulate 2.62 0.60 0.23 0.27 0.11 0.44 0.70 l
- 9. Isotopes Released (C1) l A. Halogens Iodinu-131 2.43E-3 4.29E-4 1.04E-5 {
*-3 *-3 *-3 2.87E-3 Iodine-133 *-3 *-4 *-4 *-3 *-4 *-4 l Iodine-135 *-3 *-4 *-4 *-3 *-4 *-4 '
l B. Particulate ( Beryllium 7 2.21E-5 3.27E-5 5.48E-5 l Manganese-54 1.83E-4 8.09E-5 1.02E-4 6.08E-6 1.25E-4 3.81E-4 8.78E-4 1 Cobalt-58 1.15E-4 3.47E-5 3.65E-5 2.90E-6 4.11E-5 2.99E-5 2.60E-4 l Iron-59 5.68E-5 9.35E-6 2.04E-5 8.66E-5 Cobalt-60 2.79E-4 9.63E-5 1.44E-4 9.0BE-6 2.12E-4 2.63E-4 1.00E-3 21nc-65 1.64E-5 1.06E-5 9.35E-6 1.18E-6 7.69E-7 9.17E-6 4.75E-5 21rconium-95 2.51E-5 8.67E-6 6.29E-6 4.28E-6 1.11E-6 4.54E-5 Niobium-95 6.33E-5 1.42E-6 6.47E-6 Rtahenium-103 1.92E-5 7.90E-r 1.84E-6 2.89E-5 Ruthenium-106 5.37E-7 5.37E-7 Cesium-134 2.22E-6 5.98E-7 6.71E-5 1.43E-L 8.42E-5 Cesium-137 l 3.21E-6 9.63E-6 3.57E-6 2.79E-6 9.44E-5 6.10E-5 1.75E-4 ! Darium-L9nthanum-140 9.93E-4 9.93E-4 J Cerium-141 2.50E-5 4.43E-6 2.55E-6 3.20E-5 l Cerium-14 4 3.08E-5 1.16E-5 1.19E-5 6.85E-6 2.73E-6 3,72E-6 6.76E-5 ; Strontium-89 <1.76E-6 *-4 *-4 <6.27E-7 *-4 **4 1 Strontium-90 < 2.6 96-7 *-4 *-4 6.17E-7 *-4 *-4 l C. Gases *-5 *-2 *-2 *-2 *-2 *-2 *-2 1
*-1 With half-lives greater than 8 days. *-2 Unit out for refuelir.g and maintenance: main stack out of service. *-3 No detectable activity. *-4 Ouarterly analysis - Toch Specs. *-5 Main stack only, i
i I
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