ML20150E926
| ML20150E926 | |
| Person / Time | |
|---|---|
| Site: | Pilgrim |
| Issue date: | 12/31/1971 |
| From: | Russo P, Rich Smith BOSTON EDISON CO., INTERNATIONAL CHEMICAL & NUCLEAR CORP. |
| To: | |
| References | |
| NUDOCS 8804040186 | |
| Download: ML20150E926 (19) | |
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RETUE!! TO !!E01hT0!!Y CEliTRAL F LES B00M 018 w 'W s,
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PREOPERATIONAL ENVIRONMENTAL RADIATION SURVEY PROGRAM 4 Regulgtoy de Cy. ~ ,
2277 QUARTERLY REPORT October 1,1971 - December 31, 1971 he 4 w,ur Ntd ,
, BOSTON EDISON COMPAh7 (Q) BOSTON, MASSACHUSETTS
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I Person responsible for ICN/TRACERLAB analyses of samples & review of data i
Amef b / Y Person responsible for BECo program ICN/TRACERLAB Chemical & Radioisotope Divsion p]
g International Chemical and Nuclear Corp.
1601 Trapelo Road, Waltham, Massachusetts 02154 8804040186 711231 PDR ADOCK 05000293 R PDR 1
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l (m) ' DISCUSSION OF RESULTS Air Surveillance Air particula:e activity followed a downward trend during the quarter f rom the maximum values reached in the June-July period. This trend was antici-pated from the normally observed annual cycle. The mean gross beta values for the reference station, the on-site stations and the off-site stations were in agreement. The new on-site station r'.iat was activated on 11/3/71 is providing data comparable to that of the other stations.
Gamma dose measurements continued to range between 10.5 and 12.5 uR/hr for the on-site and off-site locations. Gamma dose measurement using thermo-luminescent dosimeters appears satisfactory based on comparative on-site and of f-site monthly and quarterly averages. The month to month variability at each
, location is still somewhat greater than desired. Continuing investigation in-(V dicates that this may be due to differences in inherent background between in-dividual dosimeters. Once individual inherent backgrounds have been established, previous data will be adjusted to reflect this.
Aquatic Surveillance Value obtained for domestic and recreational waters are consistent I l
with those previously seen and very similar to those noted for the same period a year ago. Great Pond gross beta values continue to be somewhat higher than the others.
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Sea water and marine life results are comparable to and consistent l with the earlier data reported.
Terrestrial Surveillance Milk sample values are in the same general range as for the past
/~ period wi.th the Cs values generally slightly increased and Sr decreased.
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There does not appear to be a significant difference between pc.fiods or sample locations.
The two crop samples analyzed for this period gave results similar to those obtained for earlier samples of the same type.
SUMMARY
The pre-operational environmental radiation surveillance program appears to be providing the baseline data that will be required for determining the operational effects of the plant on the biosphere. With the exception of the gamma dose measurements, the variability between sample types, collection periods and locations is as expected.
No program changes are recommended at this time. ,
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TABLE IA 52 KEY FOR TABLES IB & IC Distance and FSAR
Reference:
Direction From Sample Table 2.6.1-S ample Location Station Designation Item #
East Weymouth 23 - miles NW EW 7 Plymouth Center 4.5 - miles W-WNW PC 6 Cleft Rock Area 0.9 - miles S CR 4 Manomet Substation 2.5 - miles SE MS 5 Rocky Hill Rd. , WNW Onsite WR 2 Overlook Area Onsite QA 1 Rocky Hill Rd. , SE Onsite ER 3 Pedestrian Bridge Onsite PB
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O O O TABLE IB COMPARATIVE MONTilLY VALUES FOR GROSS BETA RADIOACTIVITY (Concentrations in pCi/m3)
Means Collection Period Reference Off-Site 1971 (EW) (PC) (CR) (MS)
(WR) (OA) ER) (PB)
October 0.10 0.13 0.11 0.14 0.11 0.12 0.11 (a)
November 0.11 0.12 0.11 0.31 0.09 0.11 0.11 0.08 December 0.10 0.11 0.09 0.11 0.08 0.11 0.10 0.11 TABLE IC COMPARATIVE MONTHLY VALUES FOR GROSS BETA RAI0 ACTIVITY (Concentrations in pC1/m3)
Ranges Collection Reference Off-Site On-Site Period (EW) (PC) (CR) (MS) (WR) (OA) (ER) (PB) 1971 __ NEn. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max.
October 0.07 0.13 0.12 0.14 0.08 0.12 0.12 0.17 0.08 0.13 0.10 0.14 0.07 0.14 (a) (a)
November 0.07 0.16 0.11 0.14 0.08 0.14 0.08 0.14 0.07 0.09 0.07 0.14 0.10 0.11 0.07 0.08 December 0.08 0.12 0.10 0.12 0.08 0.12 0.08 0.13 0.06 0.11 0.08 0.14 0.08 0.12 0.07 0.14
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9 O O TABLE III AIR PARTICULATES Iodine-131 in (Concentrations Activity pC1/m3)
Collection East Plymouth Cleft Rock Mennomet Rocky Hill Road Overlook Rocky Hill Road Pedestrian
- Period Weymouth Cen te r._ Area S ubst ation West Area East Bridge 10/13 - 10/20/71 <1 <1 <1 <1 <1 <1 <1
<1 <1 <1 <1 <1 <1 <1 11/17 - 11/24/71 <1 12/8 - 12/15/71 <1 <1 <1 <1 <1 <1 <1 <1 12/22 - 12/29/71 <1 <1 <1 <1 <1 <1 <1 <1 i
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KEY FOR TABLE IVB
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Distance and FSAR
Reference:
Direction From Dosimeter Table 2.6.2-Dosimeter Location Station Designation Item #
East Weymouth 23 - miles NW EW 19
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Kingston 10 - miles WNW KS 17 l l
Sagamore 10 - miles SSE-S CS 18 l Plymouth Airport 8 - miles WSW SA 16
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Duxbury 6.25- miles NW SS -
Plymouth 6.5 - miles SSW-SW CP -
North Plymouth 5.5 - miles WNW NP 15 l
Plymouth Center 4.5 - miles W-WNW PC 14 1 1
South Plymouth 3 - miles WSW SP 1 13 l Manomet 3. 5 - miles SE-SSE MB -
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1 Manomet 2.5 - miles SSE MS 11 l Manomet 2.5 - miles SE ME 12 1 Manomet 2.25- miles ESE-S MP 10 Clef t Rock Area 0.9 - miles S CR 9 Rocky Hill Road 0.8 - miles SE ER C l
1 Bayshore Drive 0.7 - miles W-WNW BD -
Rocky Hill Road 0.3 - miles W-WNW WR 7 1 !
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TABLE IVB V MONTHLY & QUARTERLY AVERAGE DOSE RATES (a) uR/hr Off-Site Station Oct. Nov. Dec. Quarter East Weymouth (E") 12.0 11.9 12.1 12.0 Kingston (KS) 11.9 11.7 11.6 11.7 Sagamore (CS) 12.1 11.3 13.3 12.2 Plymouth Airport (SA) 9.9 9.6 11.1 10.2 Duxbury (SS) 10.5 10.6 (b) 10.6 Plymouth (CP) 10.2 10.6 11.8 10.9 North Plymouth (NP) 13.5 (b) 12.9 13.2 Plymouth Center (PC) 9.5 9.2 11.5 10.1 South Plymouth (SP) 11.8 12.0 12.7 12.2 Manome t (MB) 9.2 9.0 8.9 9.0
~'i 12.6 12.1 12.1 (V Manomet (MS) 12.3 Manomet (ME) 13.6 13.3 14.1 13.7 Manomet (MP) 10.5 10.1 10.9 10.5 Clef t Rock Area (CR) 11.2 11.4 12.0 11.5 Rocky Hill Road (ER) 12.1 11.7 13.2 12.J Bayshore Drive (BD) 12.9 12.9 12.8 12.9 Rocky Hill Road (WR) 12.7 12.5 13.7 12.0 Average Off-Site Dose Rate per Month 11.5 11.2 12.2 i Average Off-Site Dose Rate per Quarter 11.7 (a) Net dose rate af ter subtraction of 6.6 uR/hr dose rate inherent in dosisetc. .
(b) Dostmeter stolen.
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TABLE IVC KEY FOR TABLE IVD (Jr~l Distance and FSAR
Reference:
Direction From Dosimeter Table 2.6.2 -
Dosimeter Location Station Designation Item # ___
Overlook Area 0.03 - miles S OA 2 Public Parking'Arca 0.07 - miles N-NNE PA 3 Pedestrian Bridge 0.10 - miles NE PB Rocky Hill Rd. , SW 0.12 - miles SW A Rocky Hill Rd. , SSE 0.26 - miles SSE B 5 East Breakwater 0.26 - miles ESE EB Microwave Tower 0.38 - miles S MT 6 Property Line 0.33 - alles ESE-SE C Property Line 0.34 - miles SE HB Property Line 0.89 - miles SE-SSE WH l
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Property Line 0.75 - miles SSE-S E i I
Property Line 0.21 - miles SSW H 4 j I
Property Line 0.20 - miles WSW G Property Line 0.14 - miles W I 1 Property Line 0.12 - miles NW F Property Line 0.17 - miles NNW D t Property Line 1.36 - miles SSE-S J Property Line 1,42 - miles SSE-S K O
TABLE IVD MONTHLY & QUARTERLY AVERAGE DOSE RATES ("
uR/hr On-Site Station Oct. Nov. Dec. Quarter Overlook Area (0A) 11.4 11.2 11.2 11.3 Public Parking Area (PA) 11.8 11.5 12.0 11.8 Pedestrian Bridge (PB) 13.9 13.8 14.9 14.2 Rocky Hill Road (A) 12.8 10.7 11.7 11.7 Rocky Hill Road (B) 12.5 11.6 12.9 12.3 East Breakwater (EB) 11.7 10.9 13.1 11.9 Microwave Tower (MI) 12.5 12.1 12.7 12.4 Property Line (C) 11.0 10.8 11.3 11.0 Property Line (HB 12.4 11.6 12.2 12.1 Property Line (WH) 11.4 10.8 11.3 11.2
,_ Property Line (EM) (b) (b) 11.6 (c)
(,,/ Property Line (E) 9.9 9.1 12.6 4 10.5 Property Line (H) 11.5 11.6 13.0 12.0 Property Line (G) 9.1 8.6 12.1 9.9 Property Line (I) 11.0 10.5 11.5 11.0 Property Line (F) 9.1 9.1 11.7 10.0 Property Line (D) 13.3 13.1 12.4 12.9 Property Line (J) 9.7 9.1 11.1 10.0 l Property Line (K) 9.4 9.0 10.0 9.5 l
Average On-Site Dose Rate per Month 11.4 10.8 12.1 l Average On-Site Dose Rate for Quarter 11.4 (a) Net dose rate af ter subtraction of 6.6 uR/hr dose rate inherent in dosimeter (b) Station out of service.
(c) Insuf ficient information for quarterly average.
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TABLE VA
() KEY FOR TABLE VB Sample Distance and Direction Sample Location Designation from Station Great Pond
- GP 24 - miles WNW-NW Little South Pond
- SP 4.75 - miles W College Pond CP 6.5 - miles SSW-SW Lout Pond Well* LW 4.75 - miles W Manomet Well* MW 2.7 5 - miles SSE
- Designated in FSAR, Section 2.6.3.1 l
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TABLE VB DOMESTIC AND RECREATION WATER Collection SP CP LW MW Analysis Period (a) GP Octobe r 4.6 1 1.0 4.4 1.0 3.4 1.0 <1 <1 Cross Eeta (PCi/1) November <1 1.9 1 1.0 1.4 1.0 <1 1.6 1.0 Decembe r 4.3 ! 1.0 1.5 2 1.0 3.2 ! 1.0 <1 <1 Grass Camma October < 10 < 10 < 10 < 10 < 10 i
( Pm/1) November < 10 < 10 < 10 < 10 < 10
< 10 < 10 December < 10 < 10 < 10 Sr-90 October 0.9 0.5 0.9 0.5 0.8 0.5 < 0.5 < 0.5 (PCi/1) November 1.4 ! 0.5 0.7 0.5 1.2 0.5 < 0. 5 < 0.5 December 1.4 2 0.5 1.4 1 0.5 1.0 ! 0.5 < 0.5 < 0.5
< 2.5 < 2.5 < 2.5 < 2.5 < 2.5 H-3 October (pci/ml)
November < 2.5 < 2.5 < 2. 5 < 2.5 < 2.5 December < 2.5 < 2.5 < 2.5 < 2.5 < 2. 5 October <5 <5 <5 <5 <S ,
I-131 (PCi/1) November <5 <5 <5 <5. <5 December _, <5 <5 <5 <5 <5
- One (1) cpm is equivalent to 4.5 pci if activity is assumed due to Cs.
(a) .Lu th lv composites from GP, SP and CP 4
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J l v v TABLE VIA SEAWATER
- 3 13 ^1 Collection Fractional Gross Beta; pCi/l Cross Gamma 11 I Location Date Frac. I II III IV cpm /1 pCi/ml pCi/l Pilgrim Site 10/20/71 <5 <5 26 2 5 <5 <10 < 2.5 <5 11/24/71 <5 725 6 5 <5 < 10 < 2.5 <5 12/8/71 <5 <5 <5 <5 <10 < 2.5 <5 October - December <5 <5 9 5 <5 < 10 < 2.5 <5 Composite TABLE VIB
- SEAWATER (Concentrations in pCi/1) 54 g 58,60 65 59 Location Da e Sr Cs Co 2n Fe Pilgrim Site October - December 0.6 1 0.5 0.28 ! 0.05 <5 <5 <5 <5 Composite
- One (1) cpm is equivalent to 4.5 pCi if activity is assumed due to Cs.
- Volume analyzed - 15.0 liters
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9 9 9 TABLE IX MILK (Concentrations in pCi/1)
Collection Sampling Locations Analysis Hingham Plymouth Bridgewater
_Pe riod (a)
Cs-137 October 23 2 1 20 ! 1 17 1 1 November 27 2 1 25 2 1 14 1 1 December 17 1 1 16 ! 1 10 1 1 Sr-90 October 6.8 2 0.2 5.2 0.2 6.4 2 0.2 November 7.3 ! 0.2 6.6 2 0.2 7.4 2 0.2 December 6.7 ! 0.2 7.2 0.2 6.4 1 0.3 I-134 October <5 <5 <5 November <5 <5 <5 December <5 <5 <5 Ba/La-140 October <5 <5 <5 November <5 <5 <5 December <5 <5 <5 (a) Composite of weekly samples
- - .__ ..._ -.= - ._ - . ..-. _ - _ - - ._ _ .. .._ _ .. - .. - ._. . . -.-.- .._.-. -._- __-_
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i TABLE X ;
CROPS !
- 90 137 131 I I 1 Sample Collection Gross Beta Gross Gamma Sr Cs l Type Location Date pCi/g cpm /g pCi/g pCi/g pCi/g j Cranberries Bog F 10/5/71 1.5 0.2 0.08 ! 0.01 0.060 1 0.001 0.45 1 0.05 < 0.2
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i i Potatoes Bridgewater 10/20/71 6.310.3 0.03 2 0.01 0.010 0.001 <0.05 < 0. 2
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n U APPENDIX A Results of analyses which were still in process at the time of printing of the report covering the period July 1,1971 to September 30, 1971 are given below. ,
Table Sample Sample Collection No. Location Type Date Analysis Result VB Great Pond Water July 1971 Gross Beta 15.1 1 1.0 pCi/L S. Weymouth VI Pilgrim Site Seawater July Fraction Gross Beta <5 pCi/L Composite Sept. 1971 Fraction I VII Rocky Point Cod 7/15/71 Cs < 0.05 pCi/g 13 Rocky Point Cod 7/15/71 Cs < 0.05 pCi/g Rocky Point Cod 8/13/71 ' Sr 0.008 2 0.005 pCi/g 90 pCi/g Rocky Point Mackerel 8/13/71 Sr < 0.005 90 0.015 2 0.005 pCi/g Manomet Point Lobster 7/14/71 Sr O
Manomet Point Lobs te r 8/20/71 Sr 0.018 1 0.002 pCi/g
, Rocky Point Lobster 8/26/71 Sr 0.005 10.001 pCi/g Rocky Point Lobster 9/7/71 Sr 0.012 0.001 pCi/g Rocky Point Lobste r 9/16/71 Sr 0.018 1 0.002 pCi/g 90 0.021 2 0.001 pCi/g Manomet Point Lobster 9/21/71 Sr 9
Rocky Point Pollock 8/13/71 Sr < 0.005 pCi/g 90 0.005 pCi/g Pilgrim Site (A) Rockweed S/24/71 Sr 0.008 Pilgrim Site (C) Rockweed 8/24/71 ' Sr <0.005 pCi/g Pilgrim Site (C) Rockweed 8/24/71 Cs < 0.05 pC1/g Manomet Point Rockweed 8/26/71 Sr 0.010 2 0.005 pCi/g <
90 pCi/g Manomet Point Irish Moss 7/15/71 Sr < 0.005 O
Rocky Point Irish Moss 7/15/71 Sr 0.012 10.005 pCi/g !
90 0.002 pCi/g Ellisville Irish Moss 7/22/71 Sr 0.025 IX Plymouth Milk August 1971 Cs (a) 90 Plymouth Milk August 1971 Sr 9.1 2 0.2 pC1/L 90 pCi/g X Plymouth Corn 9/8/71 Sr <0.005 O
Plymouth G Cranberries 9/24/71 Sr 0.075 2 0.005 pCi/g I l
i (a) Aliquot lost in processing !
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