Text

Rept on Radioactive Effluent Releases & Waste Disposal for Humboldt Bay Power Plant,Unit 3,Jul-Dec 1980
	ML19341D256
Person / Time
Site:	Humboldt Bay
Issue date:	03/03/1981
From:	; PACIFIC GAS & ELECTRIC CO.
To:	;
Shared Package
ML19341D252	List: ML19341D251; ML19341D256;
References
	NUDOCS 8103050233
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{{#Wiki_filter:-_ o O PACIFIC GAS AND ELECTRIC COMPAh"l DOCKET NO. 50-133 REPORT ON RADIOACTIVE EFFLUENT RELEASES AND WASTE DISPOSAL FOR HUMBOLDT BAY PO'n'ER PLANT UNIT NO. 3, COVERING THE PERIOD JULY 1, 1980 THROUGH DECEMBER 31, 1980 This report summarizes the quantity of each of the principal radionuclides released to unrestricted areas in liquids and gaseous effluents and summarizes radioactive waste disposal from July 1,1980 to December 31, 1980 and is submitted in accordance with Section IX.I.3.a. of the Tr.hnical Specificatiqns. A. SUPPLEMENTAL INFORMATION 1. Regulatory Limits a. Fission and activation gases: The curren'. license limits are 50,000 pCi per second for an annual cuerage release rate and 500,000 pCi per second for an i stantaneous release. b. Iodines: Refer to c., "Particulates." c. Particulates: The limit "for halogens and particulate material based on the isotopes present on the sampling filters after 48 hours decay period: is 0.18 pCi/sec. d. Liquid Effluents: 10CFR20. 2. Maximum Permissible Concentrations Provide the MPC's used in determining allowable release rates or concentrations, Fission and activation gases: Not app?icable. a. b. Iodines: 3x10-10 pCi/cc Particulates, half-lives >8 days: 3x10-10 pCi/cc c. d. Liquid effluents: 10CFR20, Table II, Appendix B. 3. Average Energy Not applicable. j 81030502& l i

l l I l l 4 Measurements and Approximations of Total Radioactivity The methods used to measure or approximate the total radioactivity in effluents and the methods used to determine radionuclide composition are as follows: r a. ' Fission and activation gases: Due to the long decay time since operation (shutdown July 2,1976), no detectable releases of fission and activation gases can be expected. An arbitrary 1 microcurie of each nuclide found during operation has been reported. b. Iodines: i Charcoal cartridges are removed from the stack sampling system weekly and, af ter 48 hour decay, are gamma spectrum l counted for 1-131 and I-133 (with a Sodium Iodide detector). Due to the long decay time since operation, no detectable i l releases of Iodines have been found. An arbitrary 1 1 microcurie of each nuclide found during operation has been reported. J c. Particulates: Filter papers are removed from the stack saryling system weekly and gross beta counted. An arbitrary 3 microcurie 2 has been reported for Bala140 and Sr89 due to the long decay time since operation. Selected filters for each quarter are decay counted to determine other particulates (long-lived), alpha emitters, and analyzed for Sr90. d. Liquid Effluents: Waste receiver tank cnd waste hold tank batch samples were gamma spectrum analyzed and gross Beta and gross Gamma counted. The nuclides identified account for the gross gamma and the 2ross beta count. Laundry waste tanks are individually analyzed only by gross beta and gross gamma counting, and based on the mixture determined above. A quarterly composite of all batches is analyzed for Tritium and Sr90. I d l l

2 Batch Releases 5. a. Liquid: l 1) Number of batch releases: 27 (A total of 4,411 gallons of laundry waste and 48,050 gallons of . treated waste tank discharge) 2) Total time period for batch releases: 37 hours, 24 t minutes 4-i 3) Maximum time period for a batch release: 5 hours, 20 minutes i 4) Average time period for batch releases: I hour, 23 minutes i 4, 5) Minimum time period foc a batch release: 10 minutes 6) Average stream flow during periods of release of 3 effluent into a flowing stream: Not Applicable, Discharge is into Humboldt Bay, ] b. Gaseous: None 6. Abnormal Releases i a. Liquid: j i 1) Number of releases: None 2) Total activity released: None b. Gaseous: I 1) Number of releases: None 2) Total activity released: None B. CASEOUS EFFLUENTS The monitoring systems associated with the emergency condenser and liquid radwaste system vents to atmosphere indicate that no detectable i relpases of radioactive gases occurred during the report period. Therefore, only gaseous radioactive waste releases made via the 250 4 foot stack are reported. Table lA summarizes the total quantities of radioactive effluents Table 1B summarizes the total quantities for released by quarter. each of the nuclides determined to be relcased. I l 1 f i

l-- C. LIQUID EFFLUENTS The activity in each batch _of liquid radioactive waste was either in solution at the time of discharge or the batch was filtered l Analysis of weekly composite samples from the prior to discharge. l plant effluent canal'and monitoring by the-liquid waste; discharge l monitor confirmed that no unaccounted release of radioactive waste l. occurred during the report period. o i Table 2A summarizes the total quantities of radioactive effluents released by quarter. Table 2B summarizes the total quantity for each of the nuclides determined to be released. D. SOLID WASTE During the report period, a total of 82.01 cubic meters of evaporator . bottoms (solidified with Urea Formaldehyde), totaling 69.5 Curies, i was shipped. Table D1 summarizes these radioactive waste shipments. P L E. EtWIRONMENTAL MONITORING The environmental monitoring program was continued unchanged during this period. Quarterly reports, " Environmental Radiation Study in the Vicinity of Humboldt Bay Power Plant (HBPP), Eureka, California," contain the basic radiologic data collected from the Humboldt Bay Power Plant environs. The most recent reports issued, Nos. 77 and 78, are attached and contain data from the second quarter 1980 and third quarter 1980. Although data collected during the fourth quarter have not been issued in report form, the dosimeter data from this period was included in the analysis detailed below. The quarterly reports describe the sampling locations, total number of samples of each media sampled, and the measured radioactivity concentration in the samples. The types of media sampled are marine flora, fish, and invertebrates; bottom sediment; milk; air particulate; and external radiation exposure measured by ion chambers. Plant releases continued to be much lower than when the plant last operated. The calculated potential public exposures due to the plant releases were very low at that time. Therefore, potential exposure calculations were determined only from the dosimetry data. There are currently 30 dosimetry stations (Figure lE) in the vicinity of the plant. Ionization chambers, read on a biweekly basis, are used for dosimetry. Stations 2 and S are considered to be background in that they are assumed to be completely removed from the influence of the plant. i In order to test for statistically significant difference between l stations, two statistical tests (a two-way classification, and a 95% l confidence limit least significant difference test) were made using biweekly dosimeter readings for each station. The exposure extrapolated to one year for the background stations, Stations 2 and 5, was 78.6 milliroentgens per year (mR/yr). Two stations were found to be l statistically higher than this background value. These stations and their extrapolated yearly exposures are as follown: Station 16, 100.3 and Station 27, 90.6. The extrapolated exposure measured at the stations ranged ftit: a high of 100.3 mR/yr at Station 16 to a low of 71.0 mR/yr at Station 6.

F. METEOROLOGICAL DATA-Wind speed and direction and temperature differential are presently recorded on strip charts, but the meteorological data logging -system'was removed from service in 1967. Therefore, the information specified by Regulatory Guide 1.21, Appendix B, Section,F, is not readily available for this report period. Table F1 summarizes the cumulative joint frequency-distribution of i _ wind speed, vind direction, and atmospheric stability for the period April, 1962 through June, 1967 when the meteorological data logging system was in service. i l f i n i i 4 l J l l l-i I

i TABLE B1 EFFLUENT AND WASTE' DISPOSAL.NEMI ANNUAL REPORT 1980 - I CASEOUS EFFLUENTS - SUMMATION OF ALL-RELEASES i Est. Third Fourth . Total Unit Quarter -Quarter Error l A. Fission & activation gases i 1. Total release Ci I* 1,lE-5 LT 1.lE-5 2.00El 2. ' Average release rate LT 1.40E-6 LT 1.40E-6 for period pCi/sec 3. Percent of Technical Specification limit LT 2.80E-9 LT2.80E-9 f B. Iodines i i 1. Total iodine-131 Ci LT 1.00E-6 LT 1.00E-6 1.50E1 2. Average release rate for period (I-131) uCi/see LT 1.27E-7 LT 1.27E-7. i l 3. Percent of Technical Specification limit LT7.06E-5 LT7.06E-5 4 l l C. Particulates r 1. Particulates with half-lives >8 days C1 9.62E-5 2.27E-4 1.50E1 l 2. Average release rate for period pCi/sce 1.21E-5 2.89E-5 3. Percent of Technical Specification limit 6.72E-3 1.60E-2 i l 4. Jross alpha radioactivity Ci LT 5.33E-7 LT 1.39E-7 D. Tritium 1. Total release Ci LT 1.00E-2 LT 1.00E-2 5.00El l 2. Average release rate for period pCi/sec LT 1.27E-3 LT 1.27E-3 e .. + e ,.,c. ,~..m,,41 _,.,,.~., -. y

TABLE B2 EFF1.UENT AND WASTE DISPOSAL SEMTANNUA1 ?.'"'OT.T ! 980 l i GASEOUS EFFLUENTS - ELEVATED RELEASE Continuous Mode Nuclides Released Unit Third . Fourth Quarter Ouarter 1. Fission gases krypton-83M Ci LT1.00E-6** LT1.00E-6** krypton-89 Ci LT1.00E-6** LT1.00E-6** krypton-85M Ci LT1.00E-6** LT1.00E-6** krypton-87 Ci LT1.00E-6** LT1.00E-6** krypton-88 Ci LT1.00E-6** LT1.00E-6** _ xenon-133 Ci LT1.00E-6** LT1.00E-6** xenon-135 Ci LT1.00E-6** LT1.00E-6** xenen-135m Ci LT1.00E-6** LT1.00E-6** xenon-138 Ci LT1.00E-6** LT1.00E-6** xenon-137 Ci LT1.00E-6** LT1.00E-6** xenon-133m Ci LT1.00E-6** LT1.00E-6** LT 1.10E-5 LT 1.10E-5 Total for period Ci 2. Iodines iodine-131 Ci LT1.00E-6** LT1.00E-6** iodine-133 Ci LT1.00E-6** LT1.00E-6** a iodine-135 Ci LT1.00E-6** LT1.00E-6** Total for period Ci LT3.00E-6 LT3.00E-6 3. Particulates strontium-89 Ci LT1.00E-6** LT1.00E-6** strontiu=-90 Ci 6.93E-7 3321-7 cesium-134 Ci LT4.00E-6* LT2.00E-6* cesium-137 C1 3.37E-5 1.5bE-5 barium-lanthanum-140 Ci LT1.00E-6** LT1.00E-6** cobalt-60 Ci 4.58E-5 1.67E-4 manganese-54 Ci LT5.00E-6* LT2.00E-5*

erium-144 Ci LT5.00E-6*

LT2.00E-5* The minimum sensitivity of the plant spectrometer system for a particular nuclide depends upon the mixture of nuclides present in each batch, therefore, some nuclides not detected could be present at leve: comparable to those detected. Those nuclides expected to be present, but not detected, are reported "Less Than" (LT) typical quarter Curic maximum quantities.

- No release was detected due to the decay time since the Unit was shutdown on July 2, 1976. Quantities reported are an arbitrary 1 micro-curie.

TABLE Cl EFFLUENT AND WASTE DISPOSAL SEMIANNUAL REPORT 1980 LIQUID EFFLUENTS - SUMMATION OF ALY. RELEASES Est. Third Fourth Total Unit Quarter Quarter Error I A. Fission and activation products 1. Total release (not including tritium, gases, alpha) Ci 4.02E-2 3.50E-2 1.50El 2. Average diluted concentra-1*59E-9 1.39E-9 tion during period uCi/ml 3. Percent of applicable limit 7.26E-3 7.24E-3 B. Tritium 1. Total release ci 5.67E-2 l 3.70E-2 4.00E0 2. Average diluted concentra-tion during period uCi/ml 2.24E-9 1.46E-9 3. Percent of applicable limit F.47E-5 4.97E-5 C. Dissolved and entrained gases 1. Total release Ci LT2.00E-6 LT2.00E-6 5.00E1 D. Cross alpha radioactivity 1. Total release Ci LT2.34E-5 LT2.34E-5 7.50El E. Volume of waste released ( 4.32E4 1.55E5 _i5.00E0 (prior to dilution) liter F. Volume of dilution water used during period liter 2.53E10 2.53E10 5.00J0

TABLE C2 EFFLUENT AND WASTE DISPOSAL SEMIANNUAL REPORT 1980 LIQUID EFFLUENTS ~ ' Batch mode Nuclides Released Unit Third Fourth Quarter Quarter strontium-89 Ci LT1.00E-6** LT1.00E-6** strontium-90 Ci 5.40E-7 2.57E-6 cesium-134 2.33E-3 1.96E-3 cesium-137 2.44E-2 2.76E-Z iodine-131 LT1.00E-6** LT1.00E-6** cobalt-58 Ci LT1.00E-6** LT1.00E-6** cobalt-60 C1 1.06E-2 4T04E-3 zine-65 Ci LT1.00E-3* LIA.out-y manganese-54 Ci 9.67E-4 3.50E-5 chromium-51 Ci , LT1.00E-6** LT1.00E-6** rirconium-niobium-95 Ci LT1.00E-6** LT1.00E-6** molybdenum-99 Ci LT1.00E-6** LT1.00E-6** technetium-99m Ci LT1.00E-6** LT1.00E-6** barium-lanthanum-140 C1 LT1.00E-6** LT1.00E-6** cerium-144 i ci 8.93E-4 l 1.34E-3 neptunium-239 l Ci LT1.00E-6** LT1.90E-6** I Total for period (above) l Ci l 4.02E-2 l 3.50E-2 l ) xenon-133 Ci LT1.00E-6** l LT1.00E-6** xenon-135 Ci LT1.00E-6** l LT1.OCE-6** The minimum sensitivity of the plant's spectrometer system for a patticular nuclide depends upon the mixture of nuclides present in each batch, therefore, some nuclides not detected could be p:esent at levels cerparable to those detected. Those nuclides :voected to be present, but not detected, are reported "Less Than" (LTj t,pical quarter Curie maximum quantities.

- No release was detected due to the decay time since the unit was shutdown on July 2, 1976. Quantities reported are an arbitrary 1 micro-curie.

TABLE D1 EFFLUENT AND WASTE DISPOSAL SEMI ANNUAL REPORT SECOND HALF 0F.1980 SOLID WASTE.AND IRRADIATED FUEL SHIPMENTS T 3 L A. Solid Waste ' Shipped Of fsite for Eurial or Disposal- (not' irradiated fuel) "Est. 1. Type of Wasto Unit Quantity Total Error a. Solidified evaporator bottoms m3 8.20E1 and solidified demineralizer resins - Ci 2.5 El 6.95El 3 b. Dry compressible vaste, m None contaminated equip., etc. Ci 2. Estimate of major nuclide composition (by type of waste) a. Cesium-134 6.61E0 Cesium-137 8.83E1 4 Unidentified Mixed Fission Products 3.94E0 Cobalt-60 1.07E0 Maneanese-54 5.61E-2. b. Cesium-134 Cesium-137 Unidentified Mixed g j Fission Products Cobsit-60 Mancanese-54 3. Solid Waste Dispositien Number of Shipments Mode of Transportation Destination 3 9 Truck (Sole Usc) Richland, Washington i t B. Irradiated Fuel Shipments (Disposition) Number of Shipments Mode of Transportation j None 1 i ,y-w---s-.r-,-w+ -w, x em.---,,-.e,----- -rn e w- -e w

TABLE F1 PERCENT OF PERIOD AT.EACH WIND SPEED AND DIRECTION 4 . PERIOD'0F-RECORD: April, 1962-through June 1967 STABILITY CLASS: C ELEVATION: -250 feet _ Wind Speed (mph) at 76m Lev'el I Wind Direction (0) 0-3 4-7 8-12 13-18 19-24 >24 Totall 0. 0.02 0.06 0.05 0.03 0.02 0.01 0.20 10.00 0.02 0.03 0.04 0.03 0.01 0.00 0.13 20.00 0.03 0.03 0.01 0.01 0.00 0.00 0.08 30.00 0.02 0.02 0.00 0.00 0.00 0.00 0.04 40.00 0.00 0.01 0.00 0.01 0.00 0.00 0.02 50.00 0.01 0.01 0.00 0.00 0.00 0.00 0.02 60.00 0.01 0.01 0.00 0.00 0.00 0.00 0.03 70.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 80.00 0.01 0.00 0.00 0.00 0.00 0.00 0.01 90.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 100.00 0.00 0.00 0.00 0.00 0.'00 0.00 0.00 110.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 120.00 0.01 0.01 0.01 0.00 0.00 0.00 0.03 130.00 0.01 0.01 0.00 50.01 0.00 0.00 0.03 140.00 0.00 0.01 0.01 0.00 0.01 0.00 0.02 150.00 0.00 0.01 0.01 0.02 0.01 0.00 0.06 160.00 0.00 0.01 0.01 0.01 0.01 0.00 0.04 I 170.00 0.00 0.00 0.02 0.02 0.01 0.01 0.07 180.00 0.00 0.01 0.02 0.02 0.00 0.00 0.05 190.00 0.01 0.01 0.01 0.01 0.01 0.00 0.04 200.00 0.00 0.02 0.02 0.02 0.00 0.01 0.09 210.00 0.02 0.01 0.06 0.02 0.01 0.00 0.13 220.00 0.01 0.02 'O.08 0.04 0.03 0.02 0.19 230.00 0.01 0.06 0.12 0.14 0.05 0.02 0.39 240.00 .,0,01 0.09 0.22 0.15 0.02 0.03 0.51 250.00 0.02 0.18 0.26 0.10 0.02 0.00 0.58 260.00 0.02 0.13 0.24 0.04 0.01 0.00 0.44 l 270.00 0.02 0.16 0.22 0.02 0.01 0.00 0.42 280.00 0.02 0.13 0.11 0.01 0.00 0.00 0.27 290.00 0.02 0.10 0.10 0.01 0.01 0.00 0.24 300.00 0.01 0.09 0.06 0.00 0.00 0.00 0.15 310.00 0.01 0.04 0.06 0.01 0.00 0.00 0.12 320.00 0.01 0.03 0.03 0.01 0.01 0.01 0.12 330.00 0.01 0.03 0.03 0.01 0.02 0.01 0.11 340.00 0.01 0.04 0.04 0.03 0.02 0.01 0.15 350.00 0.01 0.02 0.06 0.07 0.05 0.01 0.22 1 Rows may not sum to exact total due to rounding of f.

m.. 3 ~ t TABLE F1 (cont) PERCENT OF PERIOD AT EAC11 WIND SPEED AND DIRECTION l'.. -PERIOD OF RECORD: April 1962 through June 1967 ' t [ . STABILITY. CLASS: D ELEVATION: 250 feet Wind Speed (mph) at,76m Level Wind Direction 0-3 4-7 8-12 13-18 19-24 . >24 Tote 'O.00 0.11 0.34 0.78 0.85 0.49 0.48 3.05 10.00 0.04 0.27 . 0.52 0.46 0.38 0.27 1.95 20.00 0.05 0.21-0.32

0. 19 0.16 0.11 1.04 4

30.00 0.06 0.20 0.16 0.08 0.03 0.04 0.56' 40.00 0.05 0.11 0.05 0.02 0.00 0.01 0.23 p 50.00 0.03 0.05 0.08 0.00 0.01 0.00 0.16 [ 60.00 0.04 0.08 0.04 0.00 0.00 0.00 0.15 70.00 0.04 0.02 0.01 0.01 0.00 0.00 . 0.08 80.00 0.02' O.04 0.00 0.01 - 0.00 0.00 0.07 90.00 0.01 0.04 0.03 0.00 0.00 0.00 0.09 100.00 0.02 0.01 0.02 0.00 0.00 0.00 0.05 110.00 0.00 0.03 0.01 0.01 0.01 0.00 0.06 120.00 0.02 0.03 0.03 0.02 0.01 0.00 0.11 130.00 0.01 0.03 0.02 0.02 0.01 0.00 0.10 140.00 0.02 0.03 0.02 0.04 0'.01 0.01 0.13 150.00 0.03 0.03 0.03 0.09 0.03 0.02 0.23 160.00 0.01 0.04 0.05 0.10 0.04 0.01 0.26 170.00 0.02 0.05 0.12 0.16 0.04 0.01 0.40 180.00 0.04 0.08 0.12 0.13 0.03 0.01 0.40 1?0.00 0.02 0.07 0.09 0.06 0.03 0.02 0.2S 200.00 0.05 0.10 0.17 0.11 0.02 0.01 0.46 210.00 0.05 0.12 0.20 0.08 0.04 0.01 0.51 220.00 0.05 0.14 0.14 0.12 0.05 0.02 0.51 4 230.00 0.03 0.14 0.17 0.11 0.06 0.02 0.53-j 240.00 0.08 0.22 0.21 0.06 0.03 0.01 0.61 t 250.00 0.08 0.17 0.13 0.04 0.01 0.00 0.43 260.00 0.08 0.22 0.13 0.02 0.01 0.00 0.47 270.00 0.12 0.21 0.11 0.03 0.01 0.00 0.49 280.00 0.05 0.20 0.11 0.04 0.00 0.00 0.40 4 290.00 0.04 0.22 0.11 0.02 0.00 0.00 0.31 l 300.00 0.10 0.21 0.20 0.02 0.01 0.00 0.53 i 310.00 0.08 0.28 0.19 0.03 0.02 0.01 0.60 320.00 0.07 0.25 0.33 0.09 0.04 0.01 0.80 1 330.00 0.06 0.21 0.35. 0.16 0.09 0.03 0.90 340.00 0.07 0.24 0.50 0.47 0.17 0.08 1.53 I 350.00 0.07 0.30 0.82 0.86 0.49 0.33 2.87 Y I i ..--m., _ _ _ -.r.,- -.. w -e.,e, ,w...,--- 3 g. ry,,%,---,--w

m,- 5 TABLE F1 (cont) PERCENT OF PERIOD AT EACil Wit;D SPEED AND DTRECTION PERIOD OF RECORD: April 1962 through June 1967 STABILI'IY CLASS: E E1.EVAT10N: 250 fcct Wind Speed (mph) at 76m Level Wind Directicn 0-3 4-7 8-12 13-18 19-24 >24 Total 0.00 1.04 1.06 2.00 1.84 0.82 0.10 6.86 10.00 0.17 0.80 1.55 0.90 0.36 0.10 3.78 20.00 0.3C 0.83 1.26 0.47 0.13 0.00 2.99 30.00 0.37 0.73 0.64 9 19 0.01 0.00 1.94 40.00 0.21 0.60 0.47 0.02 0.00 0.00 1.31 50.00 0.18 0.56 0.28 0.02 0.00 0.00 1.05 60.00 0.21 0.54 0.19 0.00 0.00 0.00 0.93 70.00 0.19 0.44 0.07 0.00 0.00 0.00 0.81 80.00 0.20 0.41 0.07 0.00 0.00 0.00 0.68 90.00 0.27 0.47 0.17 0.01 0.00 0.00 0.82 100.00 0.17 0.24 0.06 0.01 0.00 0.00 0.49 110.00 0.20 0.31 0.10 0.00 0.00 0.00 0.60 120.00 0.18 3.31 0.19 0.01 0.02 0.00 0.70 130.00 0.14 0.25 0.09 0.08 0.03 0.03 0.72 140.00 0.09 0.22 0.21 0.23 0.22 0.25 1 ~. 21 150 00 0.09 0.24 0.22 0.45 0.52 0.46 2.08 160.00 0.05 0.22 0.25 0.62 0.44 0.21 1.79 170.00 0.04 0.26 0.43 0.73 0.23 0.09 1.89 180.00 0.26 0.32 0.45 0.43 0.20 0.02 1.77 190.00 0.15 0.26 0.37 0.35 0.15 0.02 1.20 200.00 0.22 0.48 0.47 0.26 0.18 0.06 1.77 210.00 0.20 0.44 ,0.58 0.18 0.05 0.04 1.60 220.00 0.20 0.40 0.55 0.15 0.14 0.03 1.37 230.00 0.23 0.43 0.40 0.14 0.13 0.05 1.39 140.00 'O.24 0.39 0.23 0.15 0.13 0.01 1.24 250.00 0.21 0.32 0.16 0.03 0.01 0.01 0.84 260.00 0.24 0.31 0.17 0.03 0.00 0.00 0.85 270.00 0.35 0.35 0.13 0.12 0.01 0.00 0.97 280.00 0.19 0.30 0.15 0.01 0.01 0.01 0.67 290.00 0.19 0.33 0.17 0.01 0.01 0.01 0.81 300.00 0.21 0.37 0.16 0.01 0.00 0.01 0.ES 310.00 3.20 0.47 0.29 0.02 0.00 0.00 0.98 320.00 0.20 0.59

0. 65 0.12 0.01 0.05 1.72 330.00 0.22 0.87 0.98 0.35 0.02 0.02 2.45 340.00 0.20 0.88 1.55 0.74 0.01 0.00 3.48 350.00 0.19 1.02 2.02 1.41 0.55 0.13 5.22

s ".ABLE Pl PERCENT OF PERIOD AT EAC11 WIND SPCED AND DIRECTION PERIOD OF RECOPD: April 1962 through June 1967 STABILITY CLASS: F ELEVATION: 250 feet i Wind Speed (nph) at 76m Level Wind ~ Direction 0-3 4-7 8-12 13-18 19-24 >24 Total 0.00 0.42 0.08 0.03 0.00 0.00 0.00 0.53 10.00 0.05 0.06 0.05 0.01 0.00 0.00 0.18 20.00 0.05 0.09 0.08 0.03 0.00 0.00 0.24 30.00 0.1" 0.11 0.10 0.04 0.00 0.00 0.37 40.00

0. 0' O.13 0.10 0.03 0.01 0.00 0.34 50.00

0. 0!

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s s. Report 420-80.165 Rep:- Issued: ~ PACIFIC GAS AND ELECTRIC COM ANY DEFA:,D'ENT OF EN3!NEEF.IN3 RESEA,CH REP 30,T N3. 77 ENVIRONMENTAL RADI ATION STUDY IN THE VICIN?TY OF HUMSOLDT BAY PDA'ED, PLANT E' 0EKA, CALIF 00,NIA QUA TER ENDING JJNE 30, 1989 (SPRIN3) '...lyYW ft R. f. CAYOT, Chief Report Prepared By: D. L. Brownrigg P. A. Sz alinski

r Report 420-80.165 TABLE OF CONTENTS Page ii

c. O. Ta.,E5........................

L,t. r c. ii L.c. O. Flu-.., S ist r s-I SUMv,ARY I IN..,u-s.,,.10,.,,........................... . r-I SAMDLE COLLECTIONS AND ANALYSES................. 2 DISCUSSION OF ANALYTICAL RESULTS................. 2 RELEASES OF GASEOUS RADI0 ACTIVE WASTE.............. 3 REFEREN~ES............................ 4 A...d ! x............................. re v i I

l Report 420-80.165 I-l LIST OF TASLES Tatie-Page 1. Sanples Collected......................... 7 8 2. R adi oan al ys i s of Mar i ne S amp l e s............... 1 9 3. Radioanalysis of Terrestrial Samples . 10 4. Dosimeter Measurenents 11 5. Film Pack Measurements................... 12 6. Air Particulate, Station No. 3, Gross Beta Activity..... 13 7. Air Particulate, Station No. 45, Gross Beta Activity i LIST OF FIGURES Page Figure 14 i 1. Station Locations of Environmental Samples e 15 2. Station-Locations of Dosimeters and Film Packs 16 3. Chronological Display of Selected Environmental Measurements t 1 i I 11 i

Report 423-S0.165

SUMMARY

Measurements of radioactivity in marine and terrestrial sa.;1es and in air particulates from the environment near the Humboldt Bay Power F'a-t during this quarter generally remained within the range of pre:pe-ationa' background measurements. The maximum integrated dose measured was well below the permissible contribution of 500 mrem / year ir, unrest-icted areas. INTRODUCTION This is the 77th quarterly report on radiation in the environment near Humboldt Bay Power Plant (HBPP) covering the period April through 1 June 1983. This report contains information on the samples collected, methods and results of radiothemical analyses, a discussion of the results, and also information about the " Releases of Gaseous Rcdioactive Waste" supplied by the Department of Steam Generation. Information on the release of liquid radioactive waste from HBPP is reported elsewhere.I* SAMPLE COLLECTIONS AND ANALYSES Air particulate filters, dosimeters, film packs, and 15 marine and terrestrial samples were collected for this report in accordance with the requirements of the North Coast Regional Water Quality Control Board,3 ? and the Department of Health.4 A table of the samples collected and maps showing the sampling locations (Figures 1 and 2) are presented in tne Appendix.

See reference page.

2 Report 423-S3.165 Forty geoss. beta analyses, two iodine-131 analyses, and 15 gamma star.s were performed for this report. The results are tabulated in the All sai les except the dosimeters and film packs were analyzed Appendix. at the Department of Engineering Research (DER). Dosimeters were read by HSDP personnel.. Film packs were read by outside contractors. DISCUSSION OF ANALYTICAL RESULTS r The environmental samples analyzed for this report contained, in 4 general, radioactivity concentration levels comparable to preoperational activity levels of similar samples.5 During the preceding 52-week period, the maximum integrated radiation The total annual exposure at exposure was measured at Station 27. Station 27 was approximately 20.9 mR above background measured at Stations 2 and 5. Figure 3 is a chronological display of dosimeter and film pack t radiation exposures per month at Station 14 and the air particulate Reports 37, activity at Station 3 from January 1976 through this quarter. 55, and 75 contain graphs from previous years. RELEASES OF GASEOUS RADI0 ACTIVE WASTE The routine releases of gaseous radioactive wastes have been 4 m:nitored by the air ejector off-gas and stack-gas monitoring systems. The calibration of these m:nitors for noble and activated gases has been che:ked by periodic analyses of " grab" samples on a multichannel gamma The refueling, maintenance, and station scintillation spectrometer. modification outage which started in July 1976, continued through this 1 quarter; therefore, airborne releases were insignificant.

c 3 Report 420-SD.165 REFERENCES 1. Quarterly report to Regional l'ater Quality Control Board on Liquid Waste Discharge from Humboldt Bay Power Plant. 2. Letter-f rom North Coastal Regional Water Quality Control Board to PGandE, Attn: F. F. Mautz, concerning modifications to waste discharce and environmental radiation monitoring requirements, dated May 7, 1955. 3. Letter f rom No-th Coastal Regional Water Quality Control Boa-d to PGandE, Attn: Mr. P. Matthew, concerning modifications to waste discha ge requirements, dated April 8, 1966. Mr. P. Matthew, 4. Department of Public Health letter to PGandE, Attn: ~ concerning modifications to environmental radiation monitoring j requirements, dated June 17, 1966. 5. Environmental Radiation in the Vicinity of Humboldt Bay Power Plant, Reports 1-8. 6. Code of Federal Regulations, Title 10, Para. 20.105. 1 i f I l } l l l l L l i 1 - - ~ ~

d. '

4 Report 423-S3.165 APPENDIX ^ Page t 5 Methods of Sample Collection and Analysis 7 Table-1 Samples Collected S Table 2 .Radioanalysis of Ma-ine Samples 9 Table'3 Radioanalysis of Te-rest 'al Samples 10 i Table 4 Dosimeter Measurements 11 Table 5 Film Pack Measurements 12 Table 6 Air Particulate, Station No. 3, Gross Beta Activity 13 Table 7 Air Particulate, Station No. 45, Gross Beta Activity 14 Figure 1 Station Locations of Environmental Samples 15 Figure 2 Station Locations of Dosimeters and Film Packs Figure 3 Chronological Display of Selected Environmental 16 Measurements i 1 f o k ) 4 4 4 <.w.. a v v +-,,, ---w,, name .m ,>e-m, ,,nn o--p-

5 Report 420-SO.le5 f METHDDS OF SAMPLE COLLECTION AND ANALYSIS Marine samples are collected by Humboldt State College Foundation PGandE Humboldt Division personnel under th'e direction of Dr. J. A. Gast. pe-sor.nel collect the remainder of the samples. Marine and terrestrial samples are processed quarterly at DER. The Sa ples a*e freeze-dried prior to determining gross beta activity. gross beta analysis is performed on low background, thin window, gas flow proportional counters; the limit of detectability is about 0.5 pCi/gm of a Activities are reported both per gram of the standard containing K-40. dry and per gram of the original sample. The freeze-dried samples and domestic water are gamma scanned, using The limit of a Ge(Li) detector and multichannel pulse height analyzer. detectability attained in the gamma scan is typically 5 pCi/1 of water solution containing a single radionuclide. Radiciodine analyses are performed on milk samples within eight days 1 Following addition of stable iodine to the raw milk to of collection. determine chemical recovery, iodine is separated from the milk by using anion ion exchange resin. Iodine is stripped from the resin and af ter purification is precipitated as cuprous iodide for measurements by The detection limit attained by this beta-gamma coincidence counting. method is typically 0.2 pCi/ liter for I-131. The potassium content of most of the freeze-dried sa ples is ressured by flame phctometry in order to estimate the K-40 contribution to the The range of concentrations used is one to ten ppm; the gross activities.

6 Report 420-S3.165 standa-d deviation in the concentration units (Gaussian) is about 12 percent at the 5 ppm level. Using the factor of 830 pCi/g K, the activity of K 40 in a sample is calculated. The tritiu- (H-3) activity in dorrestic water is determined by analyzing a distilled aliquot of tN sample with a liquid scintillation spectrometer. The limit of detection for this analysis is typically 0.2 pCi/ml of water. The airborne particulate samplers are located at Stations 3 and 45 (Figure 1). The constant flow samplers have flow rate in the range of 30 to 401pm; an HV-70 filter is used. The filters are collected on a weekly basis and mailed to DER. The filters are counted to determine gross beta activity at least 72 hours af ter collection to allow for naturally occurring short-lived radionuclides to decay. Gamma dosimetry is performed with two ion chambers (Victoreen, Model 239) and a film pack located at each of the 30 stations shown in Figu-e 2. The ion chambers are read in the field by HBPP personnel on a biweekly basis. The lower of the two readings is normally reported since the dosimeters normally read high on f ailure. The Radiation Detection Company RDC (RDC), Sunnyvale, California, supplies and reads the film packs. reports film pack doses relative to " background" at the RDC laboratory, which consistently is 8 rR/ month. The + term in tne f ollowing tables is the two-sir.a error; i.e., the 95 percent confidence level. l {

= TABLE 1 Report 420-80.165 SAMPLES COLLECTED Marine Verte-Clams & Other Bottom Terres-Air Dost-Film' Station Flora brates Oysters Invert. Sedim. trial Partic. meters Par.k s 2 6' 3 1 K. Salmon Picnic Area 6 3 2 1742 Wood, Fortuna 12 6 3 3 lhimboldt tiill (Illi) Rd 4 Wood & K, Eureka 1 6 3 5 Redwood Ave, Arcata 6 Table Bluff & Clough 6 3 7 Col. of the Redwds 8 Hrbit til Rd 9 F, arbor View 10 i? St., Field Lndg 6 3 7 11 Whittier Ct 12 Bell liill Rd, HH 13 Crab St, Buhne Pt 14 South Bay School 6 3 15 Eich Rd 1 6 3 16 Bennett Dairy 6 3 17 Bassford Rd, Ridgewd i 18 6418 Elk River Rd 6 3 19 Noe St 20 3537 Union St 21 PG&E Well 2, !!H Rd ?? Sta B - 14th St 6 3 23 Ilarris St. Substa. 6 3 24 PG&E Office, Eureka 6 3 25 Irving Dr 26 Worthington Dr 27 Berta Road, 6700 6 3 78 Berta Road, 7200 6 3 29 Vista Rd 30 Burns Dr 13 45 liumboldt Substation 1 48 llolqorson Dairy 1 55 PGtE Outfall 2 .I 56 1000 f t. N Outf all 2 1 ~ 51 1000 ft. S Outfall 2 1 59 linok. ton Channal l 65 Coast Oyster Co.

TABLE 2 Report 470.80.165 RAD 10 ANALYSIS OF MARINE SAMPLES Y Grnss Beta Potassium I" d"* Gr ss Activity Content Act ivi t y Collec-8 eta (pci/q Dr (pCi/g Dry Sample) g,q gjg (pci4 Or-4 tion Counting Gamma-]p Dry Sample) Sample)- Sampic) 9.ple Description Date Date Beta 1 ?D320 S e nent3/ 5/18/80 6/'6/80 7.?9+0.55 134Cs=0.013+0.005 4.9 4.1 6.05+0.46 137Cs=0.015TO.004 ~ 10.0 8.3 2.35+0.17

T3318 Red Algae 5/18/80 8/ 4/80 12.1+0.87 (Giqartina agardhii)

P0319 Red Algae 3/ 5/18/80 6/11/80 8.57+0.65 7.1 5.9 1.10+0.08 (Iridaea sp.) ~4/ Fish E0321 Sediment 5/18/80 6/ 6/80 7.0410.54 137Cs=0.01410.008 4.9 4.1 5.9310.45 J. 83323 Red Algae 5/18/80 8/ 4/80 14.2+0.99 14.4 11.9 2.73+0.19 (Gi_gartina agardhii) 8.1 6.7 0.9710.07 4 83322 Red Algae 5/18/80 6/11/80 9.39+0.70 (Iridaea sp.) 30325 Sediment 5/18/80 6/ 6/80 7.3910.56 137Cs=0.01310.008 5.0 4.2 7.1410.54 17.1 14.2 3.0210.21 c/ M324 Red Algae 5/18/80 8/ 4/80 16.811.16 (Gj_gartina a,qardhii_) 9.0 7.5 0.8710.07 57 80326 Red Algae 5/18/80 7/31/80 8.5710.66 (Iridaea sp.) 6.i '/ Pacific Oyster (Gassostreagigas)

M327 Gaper Clam /

5/17/80 6/11/80 11.2+0.81 137Cs=0.05210.009 4.3 3.6 1.3310.13 3 (Trasus capex) Mvity at time of sampling. Naturally occurring radioisotopes are not reported, K40 activity of R30 pCi/ryn natural potassium. e-ins analy7ed at OTR then sent to State Department of Health, pT not collected. L

_ _ = _. Report 420-80.165 TABLE 3 RAD 10 ANALYSIS OF TERRESTRIAL SAMPLES 0Ar.UvHy Gross Rota Potassium Gross Activity Content Activit (pCi/9 Dry Collec-Beta (pCi/gDrySample) gj NCW 0 tion Counting Gamall Dry _samplo), Sample)2/ 3,,g) g)_ 'ta Samp3 Description Date Date Beta 1.4210.155/ DomesticWaterN 4/ 8/80 5/ 9/80 16.311.75 80191 33316 Soil 5/18/80 6/ 6/80 8.78*0.65 137Cs=0.13610.014 6.4 5.3 8.671ti 63 S0317 Soil 5/19/80 6/ 6/80 5.3010.61 137Cs=0.15410.013 2.9 2.4 4.0110.46 1 '. 5 80190 Milk / 4/ 8/80 5/19/80 8.39+0.67 8.4 7.0 1120+86/ ~ 6 <0.2 4_/ 4/13/80 6.4 6.4 1067+83.5/ '3 80199 Milk 6/ 4/ 7/80 5/19/80 7.33+0.60 l/ 4/14/80 <0.2 ' "ctivity at time of sampling. Naturally occurring radioisotopes are not reported. 'For K40 activity of 8:') pCi/qm natural potassium. H-3 activity less than 0.33 pCi/m1 5 rple is evaporated for beta analysis and distilled for H-3 analysis. I/ ' 'ine-131 activity, pCi/1., at time of sampling. < ;> i /1 6/kmpled jointly with the State Ocpartment of ifcalth, t i e a

TABLE.4 Report 420-80.165 DOS 1 METER MEASUREtiENTS Period Start: 4/ 1/80 4/16/80 4/29/80 5/13/80 5/28/80 6/10/80 6/26/79 Period End: 4/16/80 4/29/80 5/13/80 5/E8/80 6/10/80 6/24/80 6/24/80 Time, Days: 15 13 14 15 13 14 364 Elapsed Station Total mR Total d Total d Total d Total d Total mR Total mR -2/ 1 3.3 3.0 3.4 3.1 3.2 2.7 78.5 (48) 2 3.0 3.1 2.9 2.7 3.1 2.5 81.0 3 2.6 3.3 3.0 3.2 2.3 2.5 73.2 4 2.5 2.9 1.2 2.6 2.5 2.3 68.7 5 2.5 2.8 2.7 3.0 2.6 2.7 67.5 (46) 4 6 3.3 2.8 2.7 3.4 2.4 3.0 91.0 7 3.0 2.4 2.9 2.3 2.6 2.4 71.9 8 3.2 2.5 3.0 2.8 2.5 2.9 83.6 9 3.3 2.5 2.9 2.9 2.8 2.6 74.8 (50) 4 10 2.6 3.6 2.7 1.3 3.2 2.7 78.5 (50) 11 3.2 2.8 3.8 2.4 2.6 2.9 81.2 12 3.4 3.0 2.5 1.9 2.7 2.5 74.5 13 2.9 2.8 2.4 2.9 3.2 2.6 75.2 (48) 14 4.7 3.3 4.7 2.2 3.1 2.2 86.1 15 3.4 3.1 3.0 2.6 2.8 2.3 84.0 (50) 16 3.2 2.6 3.4 2.9 2.5 3.5 86.6 17 2.7 3.0 2.6 2.8 2.8 2.5 78.2 18 2.5 2.8 3.8 2.7 2.8 2.6 80.5 19 3.0 2.9 2.9 2.3 2.0 2.8 75.9 (50) 20 3.6 3.3 2.3 2.9 2.8 2.6 73.0 (44) 21 3.1 2.5 3.4 3.0 2.1 2.7 90.4 22 2.9 2.6 2.7 1/ 2.4 2.9 80.9 (50) 23 4.0 2.8 3.1 3!0 2.4 2.6 89.2 (48) 24 2.6 2.0 3.4 2.7 2.7 2.6 72.7 25 2.9 3.0 2.7 3.0 2.6 2.5 74.3 .26 2.8 2.9 2.9 2.8 2.7 2.8 68.4 (48) 27 4.1 3.1 3.0 3.4 2.9 2.7 95.7 (50) 28 3.1 2.9 2.5 2.3 2.4 2.2 73.1 29 3.1 2.5 2.7 2.9 2.7 2.8 76.2 30 3.0 2.9 2.9 2.8 2.7 2.5 74.1 2/ Weeks.oi, data, if less tt an 52. 1/othdosimetersread0and/orfullscale. B

i 11 %el e CO c: ' C CC c. E 0000000 C,00000000000000000000000 Nw CC c h w O cs N N Wl E NN s LA C CWl 5 O N i c eJ t LOC 4 CE Nel cE Y O00000000000000000000000000000 NN Cn c; Ch e N (N N C sa em C to HZ W E i W EE mE s I <W OO "q, y aE c c; e e NN O00000000000000000000C0000000C M CON - W -Ne e aC ea CL Me C E ,2 b C E N e C C h = e C O L C" A M C: V E L l C T ** ~ a CW C T C'I tt 4 C' C: .C.C v ~ N m e D C N Co cn O " N m e D C N CC C O ~ N m e c c N CC C' O c. sa er= wee-C%Nt%NC%NC%Nt%t%F. e - e r= w w w k L s. m m c-C. e sJ hI CL C W tof t v , ~ ~, -,

. Report 420-80.165 TABLE 6 AIR PARTICULATE STATION NO. 3 GROSS BETA ACTIVITY 't Sample Volume Collection Countin9 Numhor (m**3) Dat e Date pCf/m**3 80179 285 4/ 8/80 4/14/80 0.076+0.003 80717 376 4/16/80 4/?2/80 0.029T0.033 80230 247 4/22/80 4/25/80 0.078i0.003 80246 282 4/29/80 5/14/80 0.03270.003 80750 285 5/ 6/80 5/14/80 0.029TO.002 80276 294 5/13/80 5/19/80 0.015 0.002 5/20/80 80312 320 5/28/80 6/ 9/80 0.019+0.002 80332 245 6/ 3/80 6/ 9/80 0.019TO.002 g 80351 293 6/10/80 6/18/80 0.014TO.001 80354 276 6/17/80 6/25/80 0.014TO.001 80385 286 6/24/80 6/30/80 0.018TO.002 80393 202 7/ 1/80 7/ 4/80 0.016 0.002

Sampler not turned on - no sample collected.

i l 4

Report 420-80.165 TABLE 7 AIR PARTICULATE STATION NO. 45 GROSS RETA ACTIVITY Sample Volume Collection Counting Date Date pCi/m**3 Number (m**3) 80198 423 4/ 8/80 4/15/80 0.07840.002 80?l8 439 4/15/80 4/22/80 0.037i0.003 80231 377 4/22/80 4/25/80 0.07'170.002 80247 423 4/29/80 5/14/80 0.03170.002 80751 424 5/ 6/80 5/14/80 0.0?6TO.002 80277 431 5/13/80 5/19/80 0.016TO.001 80301 473 5/70/80 5/29/80 0.024TO.002 80313 485 5/28/80 '6/ 9/80 0.019TO.001 80333 241 6/ 3/80 6/ 9/80 0.029TO.002 80357 434 6/10/80 6/18/80 0.015T0.001 80355 423 6/17/80 6/25/80 0.015T0.001 80386 425 6/24/80 6/30/80 0.070TO.002 80394 429 7/ !/80 7/ 4/80 0.01710.001 j 1

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Report 420-80.205 Report Issued: FEB,11 135. PACIFIC GAS AND ELECTRIC COMPANY DEP/J.TMENT OF EN31NEERING RESEARCH 1 I REPORT NO. 78 ENVIRONv. ENTAL RADI ATION STUDY IN THE VICINITY OF l HUMBOLDT BAY POWER PLANT EUREKA, CALIFORNI A QUARTER EN3ING SEPTEMBER 30, 1980 (SUMMER) i f -f t ro 40 F. OT,1 Chief Report Prepared By: D. L. Brownrigg P. A. Szalinski i l l l ,,.a ,+ - - + - - ,---,,,,-.,,,,_,,-.--,_.,.7-g,-,m,, ..-.wym-,e r-, .ver,.m.

1 4 Report 420-SO.205 i TABLE OF CONTENTS Page 11 L I ST OF T ABLE S.......................... i ii LIST OF FIGURES 1 1 I l SUYNRY INTRODUCTION........................... 1 SAMPLE COLLECTIONS AND ANALYSES 2 DISCUSSION OF ANALYTICAL RESULTS............. 2 l RELEASES OF GASEOUS RA3IOACTIVE WASTE 3 REFERENCES............................ i 4 APPENDIX,............................ f 4 j h 1 4 1 1 l 4 i + s i 1 ~ '-**^rr.r79,, ""**F"YTv..uw.

Report 420-S3.205 LIST OF TABLES Page Table 7 Samples Collected...................... 1. B Radioanalysis of Marine Samples............... 2. 9 Radioanalysis of Terrestrial Samples 3. 10 4. Dosimeter Measurements................... 11

5. Film Pack Measurements...................

12 Air Particulate, Station No. 3, Gross Beta Activity..... 6. 13 Air Particulate, Station No. 45, Gross Beta Activity 7. i LIST OF FIGURES Page i Figure 14 Station Locations of Environmental Samples 1. 15 Station Locations of Dosimeters and Film Packs 2. 16 Chronological Display of Selected Environmental Measurements 3. / 4 E ii i

Report 420-S3.206

SUMMARY

Measurements of radioactivity in marine and terrestrial samples and ldt Bay Power Plant in air particulates from the environment near the Humbo during' this quarter generally remained within the rangt of preoperational The maximJm integrated dose measured was well background measurements. below the permissible contribution of 500 mrem / year in unrestricted areas. INTRODUCTION This is the 78th quarterly report on radiation in the environment near Humboldt Bay Power Plant (HBPP) covering the period July through This report contains information on the samples September 1930. collected, methods and results of radiochemical analyses, a discussion of the results, and also information about the " Releases of Gaseous Radioactive Waste" supplied by the Department of Steam Generation. Information on the release of liquid radioactive war,te from HSPP is reported elsewhere.l* SAMPLE COLLECTIONS AND ANALYSES Air particulate filters, dosimeters, film packs, and 15 marine and terrestrial samples were collected for this report in accordance with the 23 requirements of the North Coast Regional Water Quality Control Board. and the Department of Health.4 A table of the samples collected and maps showing the sampling locations (Figures 1 and 2) are presented in th f Appendix. 1

5ce reference page.

l i l I

Report 420-S0.205 2 Forty-one gross beta analyses, two iodine-131 analyses, and 15 ganma The results are tabulated in the scans were performed for this report. All samples except the dosimeters and film packs were analyzed Anen dix. Dosimeters were read by at the Department of Engineering Research (DER). Film packs were read by outside contractors. HEPP personnel. DISCUSSION OF ANALYTICAL RESULTS The environmental samples analyzed for this report contained, in general, radioactivity concentration levels comparable to preopera activity levels of similar samples.5 During the preceding 52-week period, the maximum integrated radi The total annual exposure at exposure was measured at Station 27. Station 27 was approximately 19.1 nR above background measured at Stations 2 and 5. Figure 3 is a chronological display of dosimeter and film pack radiation exposures per month at Station 14 and the air particulate Reports 37, activity at Station 3 from January 1976 through this quarter. 55, and 75 contain graphs from previous years. RELEASES OF GASEOUS RADIOACTIVE WASTE The routine releases of gaseous radioactive wastes have been monitored by the air ejector off-gas and stack-gas monitoring systems. The calibration of these monitors for noble and activated gases has bee checked by periodic analyses of " grab" samples on a multichannel gama The refueling, maintenance, and station scintillation spectrometer. his modification outage which started in July 1976, continued through t quarter; therefore, airborne releases were insignificant.

Report 420-83.205 3 \\ REFERENCES Quarterly report to Regional Water Quality Control Board on Liquid 1. Waste Discharge from Humboldt Bay Power Plant. Letter from North Coastal Regional Water Quality Control Board to F. F. Mautz, concerning modifications to waste 2. discha ge and environmental radiation monitoring requirements, dated PGandE, Attn: May 7, 1955. Letter from North Coastal Regional Water Quality Control Board to Mr. P. Matthew, concerning modifications to waste 3. PGandE, Attn: discharge requirements, dated April 8,1956. Mr. P. Matthew, Department of Public Health letter to PGandE, Attn:con J 4. requirements, dated June 17, 1956. Environmental Radiation in the Vicinity of Humboldt Bay Power Plant, 5. Reports 1-8. Code of Federal Regulations, Title 10, Para. 20.105. 6. t f

4 Report 420-80.206 APPENDIX Page 5 Methods of Sample Collection and Analysis 7 Table '1 Samples Collected 8 Radioanalysis of Marine Samples Table 2 9 Radionnalysis of Terrestrial Samples Table 3 10 Table 4 Dosimeter Measurements 11 Table 5 Film Pack Measurements 12 Air Particulate, Station No. 3, Gross Beta Activity Table 6 13 Air Particulate, Station No. 45, Gross Beta Activity Table 7 14 Station Locations of Environmental Samples Figure 1 15 Station Locations of Dosimeters and Film Packs Figure 2 Chronological Display of Selected Environmental 16 Figure 3 Measurements t

5 Report 420-80.206 METHODS OF SAMPLE COLLECTION AND ANALYSIS Marine sa ples are colleeted by Humboldt State College Foundation PGandE Humboldt Division personnel undar the direction of Dr. J. A. Gast. personnel collect the remainder of the sa ples. Marine and terrestrial sa :ples are processed quarterly at DER. The Sa ples are freeze-dri6d prior to determining gross beta activity. gross beta analysis is performed on low background, thin window, gas flew proportional counters; the 'imit of detectability is about 0.5 pCi/gm of a Activities are reported both per gre of the standard containing K-40. dry and per gram of the ori(inal sample. The freeze-dried samples and domestic water are goma scanned, using a Ge(Li) detector or an Intrinsic Germanium detectnr and a multichan The limit of detectability attained in the gamma pulse height analyzer. scan is typically 5 pCi/1 of water solution containing a single radionuclide. Radiciodine analyses are performed on milk samples within eight days Following addition of stable iodine to the raw milk to of collection. determine chemical recovery, iodine is separated from the milk by using Iodine is stripped from the resin and af ter anion ion exchange resin. purification is precipitated as [yprous iodide for measurements by The detection limit attained by this beta-ga r.a coincidence counting. method is typically 0.2 pCi/ liter for I-131. The potassium content of most of the freeze-dried samples is measured 1 by flame photometry in order to estimate the K-40 contribution to the The range of concentrations used is one to ten ppm; the gross activities. i l

Report 420-S3.205 6

f standard &viation in the concentration units (Gaussian) is about Using the factor of 830 pCi/g K, the activity percent at the 5 ppm level.

of K-40 in a sample is calculated. The tritiu- (H-3) activity in do~estic water is determined by analyzing a distilled aliquot of the sample with a liquid scintillation The limit of detection for this analysis is typically 0.2 spectroneter. pCi/ml of water. The airborne particulate sa.plers are located at Stations 3 and 45 The constant flow samplers ha've flow rate in the range of 30 (Figure 1). The filters are collected on a weekly to 40 1pm; an HV-70 filter is used. The filters are counted to determine gross beta basis and mailed to DER. activity at least 72 hours af ter collection to allow for naturally occurring short-lived radionuclides to decay. Gamma dosimetry is performed with two ion chambers (Victoreen, Model 239) and a film pack located at each of the 30 stations shown in Figure 2. The ion chambers are read in the field by HBPP personnel on a biweekly The lower of the two readings is normally reported since the basis. The Radiation Detection Company dosimeters normally read high on failure. RDC (RDC), Sunnyvale, Californb, cupplies and reads the film packs. reports film pack doses relative to " background" at the RDC laboratory, which cor sistently is 8 mR/ month. The + term in the following tables is the two-sig a error; i.e., the 95 percent confidence level. ^ - ' " -

.,5 TABLE 1 SAMPLES COLLECTED Marine Verte-Clams & Other Bottom Terres-Air Dosi-Film trial Partic. vters Packs Flora brates Oysters _ invert._ Sedim._ _ Station _ 7 3 2 7 3 1 K. Salmon Picnic Area 13 7 3 2 1742 Wood, Fortuna 7 3 3 Humboldt Hill (HH) Rd 7 3 4 Wood & K, Eureka 1 7 3 5 Redwood Ave, Arcata 7 3 6 Table Bluff & Clough 7 3 7 Col. of the Redwds 7 3 4 8 Hmbit H1 Rd 7 3 i 9 Harbor View 7 3 i 10 B St., Field Lndg 7 3 11 Whittier Ct 7 3 12 Bell Hill Rd, HH 7 3 13 Crab St, B/.ne Pt 7 3 ~ 14 South Ray School 6 3 u 1 15 Eich Rd 7 3 16 Bennett Dairy 7 3 17 Bassford Rd, Ridgewd 7 3 18 6418 Elk River Rd 7 3 19 Noe St 7 3 20 3537 Union St 7 3 21 PG&E Well 2, ml Rd 7 3 22 Sta B - 14th St 7 3 23 Harris St. Substa. 7 3 24 PG1.E Office, Eureka 7 3 25 Irving Dr 7 3 26 Worthington Dr 7 3 27 Berta Road, 6700 7 3 y 28 Berta Road, 7200 7-3 E 29 Vista Rd 13 30 Burns Dr 3 45 Humboldt Substation 1 'g 48 Holgerson Dairy 1 A, 1 55 PGr.E Outfall 1

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56 1000 f t. N Outfall 2 1 ? 2 '4 57 1000 ft. 5 Outfall 1 59 Hookton Channel 1 55 Coast Oyster Co. u a 3

TABLE 2 RADI0 ANALYSIS OF MARINE SAMPLES ~ K40 Activity O' 'S l' 355 "" in Potassium ^CU*"Y Gross Activity Content (pCi/g Dry (pCi/9 Oriq. Collec-Beta (pCi/_ggy Sample) (mg K/ - Sample)2/ Sampic) tion Counting --- Gamma-f Dry Sampir:) j Sta Sample Description Date Date Beta 5.76 4.78 4.9'110.42 55 80467 Sediment 3/ 7/28/80 10/ 3/80 6.0310.51 137Cs=0.0171 0.004 Red Algaell 55 (Gigartina agardhii_) 11.7 9.68 1.?510.09 55 80468 Red Algae / 7/28/80 9/ 2/80 9.9610.73 3 (Iridaea sp.) Fishi/ 4.74 3.93 4.2410.50 55 56 80470 Sediment 7/28/80 10/ 8/80 4.8510.57 95Zr=0.02310.012 10.9 9.03 1.4240.11 m ~ 56 80472 Red Algae 7/28/80 11/ 2/80 8.36+0.67 (Gigartina agardSii) 11.3 9.37 0.7310.06 56 80471 Red Algae 7/28/80 11/ 2/80 8.4210.68 57 80473 Sediment 7/28/80 10/ 3/80 6.0010.50 137Cs=0.01110.003 5.32 4.42 5.1210.43 (Iridaea sp.) 11.5 9.51 1.3110.10 57 80475 Red Algae 7/28/80 10/17/80 8.9510.68 (Gigartina agardhti_) 12.1 10.0 1.3010.11 57 80474 Red Algae 7/28/80 10/17/80 8.2810.67 (Iridaea sp.) 6.39 5.30 1.0240. Pacific Oyster I 7/31/80 9/ 2/80 5.6740.46 65 80477 (Crassostrea Qas) 1.99+0.15$ 59 80476 Gaper Clam / 7/28/80 9/ 2/80 8.20+0.62 95Zr=0.137+0.062 9.74 8.08 ~ /., 3 ~ ~ N (Tresus capex) S Naturally occurring radioisotopes are not reported. U lctivTty at timn of sampling. 7/For K40 activity of 830 pCi/tyn natural potassium.3/ Samples analyzed at DER '/ Sample not 'available at this time.

TABLE 3 RAD 10ANALYSl$ OF TERRESTRI AL SAMPLES K40 Activity Gross Bota Potassium in P tassium 3g Gross Activity Content (pCi/g Dry (pCih 0 *. Collet-Beta (p /g D_ry Sample) gf tion Counting Gammall DrySamp3), Sample)U Sampic) Date 8 eta 1.76*0.21 / 5 Sta Sample Description Date Dcmestic Water / 7/16/80 8/23/80 10.7+1.3 3 1 80430 1 80465 Soil 7/28/80 10/17/80 7.46+0.61 137Cs=0.06540.010 6.20 5.15 7.37*0.60 5 80466 Soil 7/28/80 10/ 3/80 6.86+0.55 137Cs=0.229+0.008 7.13 5.92 4.89+0.39 54Mn-0.008TO.008 16 80452 Milk 6/ 7/28/80 10/17/80 8.13+0.66 140Ba=0.28240.250 12.9 10.7 935+765/ e 1311=<0.20-I/ 8/ 1/80 45 80453 Milk 6/ 7/28/80 10/17/80 6.2640.55 131I=<0.20 8.44 7.00 944+83/ 5 ~ I/ 8/ 4/80 ~ Naturally occurring radioisotopes are not reported. )./Activityattimeofsampling. Efror K40 activity of 830 pCi/gm natural potassium. H-3 activity less than 0.20 pCi/ml. 1/ ampie is evaporated for beta analysis and distilled for H-3 analysis. S $/ odine-131 activity, pCi/1., at time of sampling. l 3/pCi/1. 5/SampledjointlywiththeStateDepartmentofifealth. f + ,+ ls OO

"A-- TABt.E 4 DOSIMETER MEASUREMENTS Period Start: 6/24/80 7/ 8/80 7/23/80 8/ 5/80 8/19/80 9/ 2/80 9/16/80 10/ 2/79 Period End: 7/ 8/80 7/23/80 8/ 5/80 8/19/80 9/ 2/00 9/16/80 9/30/80 9/30/80 14 15 13 14 14 14 14 364 2/ Elapsed Station Total mR Total mR Total mR Total mR Total d Tctal mR Total mR Total mR Time, Days: 1 3.1 3.5 2.9 3.3 3.6 3.3 3.4 80.7 (48) 2 2.9 2.9 3.6 3.3 2.8 3.2 4.0 83.0 3 3.0 2.9 2.8 2.5 2.6 3.3 3.5 73.6 2.4 2.4 2.4 2.8 2.8 3.4 67.7 3.3 66.7 (46) 5 2.8 2.9 2.5 2.7 2.8 6 2.1 3.2 3.0 2.6 2.7 .6 3.1 89.8 4 7 2.8 3.3 2.9 2.8 2.2 2.8 2.2 71.6 3.6 2.3 3.4 2.9 2.5 3.4 3.4 86.1 9 3.0 3.0 3.0 3.0 2.8 2.8 3.0 77.5 (50) 10 2.8 2.5 2.6 2.7 2.6 1.0 2.8 77.6 (50) 8 11 2.7 2.5 3.2 2.5 1.r 2.8 2.8 81.2 5.4 2.6 79.8 g 13 2.5 3.4 2.3 3.0 .7 2.8 2.9 77.1 (48) 12 2.5 2.7 2.8 2.4 14 2.1 2.6 3.3 3.1 c.4 3.2 S.2 89.8 15 2.9 2.7 2.6 3.1 2.9 2.8 3.4 84.6 (50) 16 3/ 7.3 3.7 3.7 3.8 3.6 3.6 87.6 (50) 17 273 2.4 2.4 2.8 2.7 3.3 2.8 76.6 18 3.1 3.2 3.2 2.7 3.2 3.2 3.5 80.0 19 2.4 3.1 3.3 2.9 2.2 3.0 3.5 75.8 (50) 20 2.8 2.6 3.0 3.1 2.7 3.1 3.3 77.2 (48) 21 2.5 2.7 2.6 2.3 2.8 3.1 3.0 90.9 22 3.0 2.9 3.4 2.7 2.5 2.8 2.6 80.1 (50) 23 3.3 3.0 2.5 2.8 3.4 3.5 2.4 79.8 (48) 24 2.6 2.7 2.8 2.4 2.7 2.8 1.5 71.9 !? 25 3.1 2.6 2.6 3.1 2.5 2.8 2.7 75.6 26 2.9 3.4 2.3 2.5 3.1 2.7 3.0 70.8 (48) U 27 2.6 4.1 3.2 3.3 3.1 3.5 4.7 94.5 (50) 3 f 28 2.7 2.4 3.1 2.9 3.0 2.6 3.2 72.9 Is 29 2.9 3.2 3.0 3.1 2.8 3.0 3.4 77.4 lo 30 2.4 2.9 2.8 2.6 2.2 2.8 3.5 73.9 ,o 2_/ Weeks of data, if less than 52. 3fEquipmentfailure, y 1/Both dosimeters read 0 and/or full scale. k

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TABLE 6 AIR PARTICULATE STATION NO. 3 GROSS BETA ACTIVITY Sample Volume Collection Counting Number (m**3) Date Date pCf/m**3 80412 288 7/ 8/80 7/18/80 0.016*0.002 80425 282 7/15/80 7/24/80 0.013TO.002 80445 286 7/22/80 8/ 4/80 0.014T0.001 80454 281 7/29/80 8/ 7/80 0.01270.002 80490 293 8/ 5/80 8/14/80 0.015T0.001 80505 275 8/12/80 8/19/80 0.01770.002 80540 2B6 8/19/80 8/23/80 0.014TO.001 80558 288 8/26/80 9/ 4/80 0.01870.002 80577 289 9/ 2/R0 9/ 8/80 0.02270.002 80593 279 9/ 9/80 9/12/80 0.014T0.001 80617 290 9/16/80 9/26/80 0.076TO.002 80629 281 9/23/80 9/29/80 0.0377D.003 80643 296 9/30/80 10/ 7/80 0.033 0.003 11, fa 6 I?

i l TABLE 7 1 AIR PARTICULATE STATION NO. 45 CAOSS BETA ACTIVITY Sample Volume Collection Counting Number (m**3) Date Date pC1/m**3 80413 426 7/ 8/80 7/18/80 0.016+0.001 80426 429 7/15/80 7/24/80 0.016TO.001 80446 481 7/23/80 8/ 4/80 0.01170.001 80455 367 7/29/80 8/ 7/80 0.017T0.001 80491 433 8/ 5/40 8/18/80 0.014TO.001 80506 418 8/12/80 8/19/80 0.017T0.001 80541 432 8/19/80 8/23/80 0.015T0.001 w 80559 429 8/26/80 9/ 4/80 0.020T0.002 80578 439 9/ 2/80 9/ 8/80 0.02270.002 80594 412 9/ 9/80 9/16/80 0.022T0.002 80618 442 9/16/80 9/26/80 0.023T0.002 80630 383 9/23/80 9/29/80 0.036TO.003 80644 433 9/30/80 10/ 7/80 0.031T0.002 i? ~s 1 3 u i e' .b ~ 5 gO

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ML19341D256

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