ML20127N492

Forwards Lll Info Re Fish & Frog Collections for Liquid Effluent Environ Study for Feb & Mar 1985.Info Expected to Show Seasonal Effects,But Addl Data Needed for Confirmation. Monthly Lll Results Will Be Forwarded as Received

ML20127N492
Person / Time
Site:	Rancho Seco
Issue date:	06/14/1985
From:	Reinaldo Rodriguez SACRAMENTO MUNICIPAL UTILITY DISTRICT
To:	Martin J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
References
RJR-85-297, TAC-56033, TAC-56034, NUDOCS 8507010632
Download: ML20127N492 (17)

Text

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• SACRAMENTO MUNICIPAL UTILITY DISTRICT O 6201 S Street, P.O. Box 15830, Sacramento, CA 95813; (916) 452-3211 RJR 85-297 AN ELECTRIC SYSTEM SERVING THE!bd[hkOALNh$tNld l June 14, 1985 9EC10N V1.V J B MARTIN ADMINISTRATOR REGION V 0FFICE OF INSPECTION AND ENFORCEMENT U S NUCLEAR REGULATORY COMMISSION 1450 MARIA LANE SUITE 210 WALNUT CREEK CA 94596 DOCKET 50-312 LICENSE NO. DPR-54 RANCHO SECO LIQUID EFFLUENT ENVIRONMENTAL STUDY The District is enclosing the latest information from Lawrence Livermore National Laboratory (LLNL) concerning fish and frog collections downstream from Rancho Seco during February and March 1985. The LLNL studies are showing what is believed to be seasonal effects but additional data is necessary for confirmation. LLNL is taking monthly collections and we will be forwarding the resMts to you as they are received.

R. J. RODRIGUEZ  %

ASSISTANT GENERAL MANAGER, NUCLEAR Enclosure 8507010632 850614 DR ADOCK0500g2 1

1E- K

e Biomedical & Environment:I Sci:ncu Division:

Lawrence Livermore National Laboratory J

A May 29, 1985 Mr. Edward Bradley Nuc ear Engineering Division Sacramento Municipal Utility District 6201 Sth St., Box 15830 Sacramento, CA 95813

Dear Ed,

Attached are several tables of fish concentration data generated from

. collections made at several downstream locations in February and March. The final table is a summary of mean flesh concentrations for the different fish and for frog legs.

These are several noteworthy results to consider.

134, 137

1) Concentrations of Cs in the flesh of frog legs are comparable to those in bluegill flesh collected at the same station during March.

2) There has been no significant change in the concentration of Cs in the flesh of bluegill between 1984 and March 1985. (Reference to the summary table and table 5, page 18 of our March 22 report). The best regression equation relating the March concentration data with downstream distance is:

C= 8.71

-0.270 (0 in km; C in pCi/g wet wt)

An Eaval Cecortunity Emphryer

• Universnty of Catitornoa

• PCB $507

• Livermore. CA 94550

• Ph. 4 t$-422-8361

• FTS $32 8361

• nVX 910-326-8339

• DCE LLNL LVMR

3) Bass and catfish concentrations are unlike those encountered in 1984. At most stations the concentrations in bass and catfish now exceed the levels in bluegill. In 1984, bluegill flesh concentrations always exceeded those of bass and catfish caught at the same downstream locations. We did not,.however, have collections in March f rom last year for comparison so these differences may be a seasonal effect. We'll have to wait and compare collections later in the year to see if the levels change. If bluegill levels are not the highest in collection during April and May, I don't have a good explanation for the reversal at this time. At many stations (R-30, RS-17, R-5, R-8) the levels of Cs in bass during March of 1985 exceeded the mean levels encountered during last year at the respective stations (reference summary table and page 18,22 March report).

4) Levels in bass still appears to decrease with distance downstream in the manner. seen for bluegill except at station R-8,13 km downstream, where concentrations are now as high as those in fish from 5 km downstream. Without the data from R-8, the best fit to the bass data for March yields this equation:

-0.240 C = 11.3 e

5) The single catfish caught at station R-5 in February had an unusually high concentration of Cs. All these high values encountered in fish during the late winter season suggest strong seasonal ef fect in regulating ,

the fish body burdens of Cs.

6) Zero releases of '

Cs since November 1984 have resulted in no significant decrease in the Cs levels in fish. Although your computed dose rates should be zero, based on zero releases, the truth of the matter is that dose rates from fish consumption (based on March 85 results) will be comparable to those estimated in 1984.

If there are any questions about the data, please call me.

Best regards, W

/

Victor Noshkin Section t.eader Aquatic Sciences VN/mt encls.

O

1 L - Concentrations of radionuclides in flesh of fish collected on 3-20-85 at F > Station R-5, 4.6 km from the plant outfall.

Number of - Mean fresh pCi/g wet wt. a Sample Common fish in Dry / Wet wt. whole ID name pooled wt fish (g) 134'Cs 137Cs sample l-i J442 Bluegill 1 .184 93 0.98(10) 2.6(5) l J444 Largemouth Bass 1 .204 422' 3.l(2) 8.4(2) l

- J446 Largemouth 8 ass 1 .198 269 3.0(2) 8.l(1)

J448 Largemouth Bass- 1 .197 191 2.0(2) 5.l(2)

. J528 Catfish 1 .175 213 1.3(6) 3.2(3)

J530 Catfish 1 .181 230 2.l(3) 5.4(2)

L J532 Catfish 1 167 175 1.3(5) 3.6(3)

I J534 Catfish 1 .172 124 1.7(7) 4.6(3)

J536 Catfish 1 .167 134 2.l(5) 5.4(3) t J538 Catfish 1 .179 122 3.4(4) 8.9(2) i a

Number in parenthesis is the lo counting error expressed as % of the

value listed.

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, Concentrations of radionuclides in flesh of fish caugnt on 3-19-85, 0.5 km (Station RS-17) from the plant outf all.

Number of Mean fresh pCi/g wet wt. #

Sample Common fish in Dry / Wet wt. whole pooled sample fish (g) I34 Cs 137 ID name wt Cs J560 Bluegill 1 .191 140 3.9(2) 10.2(2)

J562 Bluegill 1 .191 147 3.3(2) 8.6(2)

J564 Bluegill 1 .199 103 2.4(5) 6.4(3)

J566 Bluegill 1 .196 99 3.4(3) 9.3(2)

J568 Bluegill 1 .199 66 5.0(2) 13.4(2)

J570 Largemouth Bass 1 .209 266 1.9(2) 4.8(2)

J572 Largemouth Bass 1 .205 232 3.5(2) 9.3(1)

J574 Largemouth Bass 1 .203 256 3.6(1) 9.7(1)

J576 Largemouth Bass 1 .203 204 3.6(1) 9.7(1)

J578 Largemouth Bass 1 .205 185 3.4(2) 8.9(1) 3 Number in parenthesis is the la counting error expressed as % of the value listed.

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. Concentrations of radionuclides in' flesh of-fish caught on 2-7-85 4.6 km (Station R-5) from the plant outfall.

Number of fish in Mean fresh pCi/g wet wt a)

. S ample Common pooled Dry / Wet wt. whole

.134 Cs 137 ID Name sample wt. fish (g) Cs J439 Catfish 1 0.199 220 4.45(1) 11.4(1) a Number in parenthesis is the la counting error expressed as % of the value listed.

m

Concentrations of radionuclides in flesh of fish caught on 3-21-85, 3.0 km (Station T-1) from the plant outfall.

Number of fish in Mean fresh pCi/g wet wt a)

S ample Common pooled Dry / Wet wt. whole ID Name sample wt. fish (g) 134Cs 137Cs J646 Bluegill 1 .199 83 J648 Bluegill 1 .197 80 0.74(12) 2.1(5)

J650 Bluegill 1 .201 58 J652 Bluegill 1 .193 55 5.l(8) 13.6(2)

J654 Catfish 1 .173 391 1.6(3) 4.4(2)

J656 Catfish 1 .181 141 J662 Catfish 1 .163 132 1.7(5) 4.6(2)

J664 Catfish 1 .178 95 1.7(6) 4.8(3)

J670 Catfish '

1 .174 100 1.5(6) 3.9(3) a Number in parenthesis is the la counting error expressed as % of the value listed.

. Concentrations of radionuclides in flesh of fish caught on 3-21-85, 7.5 km (Station T-2) from the plant outfall.

Number of fish in Mean fresh pCi/g wet wt a)

Sample Common pooled Dry / Wet wt. whole 10 Name sample wt. fish (g) 134Cs 137Cs J618 Bluegill 1 .190 97 <.06 <.06 J620 Bluegill 1 .191 50 0.36(30) 0.97(13)

J622 Catfish 1 .192 306 0.75(5) 1.96(3)

J624 Crappie 1 .199 242 1.27(4) 3.43(2)

J626 Crappie 1 .197 218 1.36(3) 3.60(2)

J628 Largemouth Bass 1 .199 918 0.70(2) 1.86(2)

J632 Largemouth Bass 1 .203 1215 0.06(14) 0.14(7)

• Number in parenthesis is the la counting error expressed as f. of the value listed.

_ . - _ - _ _ _ _ _ - _ _ _ . _ _ _ _ _ - - _ - _ . . - - - - _ _ _ _ _ a

Concentrations of radionuclides in flesh of fish caught on 3-21-85, 10.2 km (Station T-3) from the plant outfall.

Number of fish in Mean fresh pCi/g wet wt a)

S ample Common pooled Dry / Wet wt. whole ID Name sample wt. fish (g) 134Cs 137Cs J612 Largemouth Bass 1 .205 190 0.51(9) 1.31(4)

J614 Bluegill 4 .199 58 0.16(20) 0.36(12) a Number in parenthesis is the la counting error expressed as % of the value listed.

Concentrations of radionuclides in flesh of fish caught on 3-21-85, 12.6 km (Station R-8) from the plant outfall.

Number of fish in Mean fresh pCi/g wet wt a)

Sample Common pooled Dry / Wet wt. whole ID Name sample wt. fish (g) 134Cs 137Cs J606 Largemouth Bass 3 .198 198 1.84(3) 5.13(1)

J608 Bluegill 8 .196 87 0.078(16) 0.18(7)

J610 Bluegill 8 .191 48 0.073(20) 0.19(7) a Number in parenthesis is the lo counting error expressed as % of the value listed.

t 4

Concentrations of radionuclides in flesh of fish caught on 3-21-85, 17.2 km (Station T-4) from the plant outfall.

Number of fish in Mean fresh pCi/g wet wt a)

Sample Common pooled Dry / Wet wt. whole ID Name sample wt. fish (g) 134Cs 137Cs J600 Largemouth Bass 3 0.207 334 0.10(7) 0.26(3) a Number in parenthesis is the lo counting error expressed as % of the value listed.

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l l .

g Concentrations of radionuclides in flesh of fish caught on 3-21-85, 19.5 km (Station F-ll) from the plant outf all.

Number of fish in Mean fresh pCi/g wet wt a)

Sample Common pooled Dry / Wet wt. whole ID Name sample wt. fish (g) 134Cs 137Cs J592 Largemouth Bass 1 .213 1193 .089(12) .19(5)

J594 Largemouth Bass 4 .219 417 .055(15) .13(7)

J596 Bluegill 3 .192 71 <.04 .083(35) a Number in parenthesis is the la counting error expressed as % of the value listed.

0

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, Concentrations of radionuclides in flesh of fish caught on 3-21-85, 0.6 km (Station R-30) from the plant outf all.

Numoer of fish in Mean fresh pCi/g wet wt a)

Sample Common pooled Dry / Wet wt. whole 10 Name sample wt. fish (g) 134Cs 137Cs J554 Bluegill 4 .194 154 2.00:2) 5.41(1)

J556 Largemouth Bass 3 .212 544 4.82(1) 12.95(1)

A Number in parenthesis is the la counting error expressed as % of the value listed.

R-30 is a sump pond connected to Clay Creek Station RS-17 by an underground pipe.

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Concentrations of radionuclides in flesh of fish caught on 3-21-85, 6.0 km (Station R-52) frcm the plant outfall.

Number of fish in Mean fresh pCi/g wet wt a)

S ample Common pooled Dry / Wet wt. whole ID Name sample wt. fish (g) 134Cs 137Cs J638 Catfish 1 .170 69 <0.2 0.80(19)

J640 Catfish 1 .169 77 2.2(10) 5.7(4) a Number in parenthesis is the la counting error expressed as % of the value listed.

Station R-52 is an irrigation pano (or pollution control pond) connected to Hadselville Creek, 6.0 km from the plant.

r; _ ~ . _

Mein concentrations of I34 Cs and I37 Cs in flesh of fish from downstream locations during February and March 1935 t

t Station and Month / Distance from Bluegill Bass 134FrogLeg7 Year plant (km) 134Cs 137Cs 134Cs 137Cs 134CsCatfigh37Cs Cs Cs 3/85 RS-11(0.5-0.6) 3.5 9.3 3.2 8.3 3/85 R-30(0.6) 2.0 5.4 4.8 13.0 1.8 5.0 2/85 RS-17(0.5-0.6) 0.9 2.2 3/85 T-1(3.0) 2.9 7.8 1.6 4.4 2/85 R-5(4.6) 4.4 11.4 0.8 2.2 3/85 R-5(4.6) 1.0 2.6 2.8 7.6 1.9 4.9 0.9 2.5 3/85 T-2(7.5) 0.2 0.5 0.4 1.0 0.75 2.0 0.29 0.64 3/85 T-3(10.2) 0.16 0.36 0.51 1.3 3/85 R-8(12.6) 0.075 0.18 1.8 5.1 3/85 T-4(17.2) 0.10 0.26 3/85 R-11(19.5) <0.04 0.08 0.09 0.19 ,

f

Cop.entration of radionuclides in flesh of frog legs collected during February and March 1985.

Distance Mean fresh e of pGi/g wet wt S ample Collection from plant wt. wnole legs Dry / wet ID Date Location (km) frog (g) pooled wt I34Cs I37Cs J433 2-15-85 R-51 1.0 167 10 .184 0.04(11) 0.10(7)

J434 2-15-85 R5 4.6 505 2 .178 0.43(14) 1.00(7)

J435 2-15-85 R-5 4.6 400 2 189 1.11(3) 2.78(2)

J436 2-15-85 R-5 4.6 136 2 .215 1.09(3) 2.78(2)

J437 2-15-85 RS-17 0.5 415 2 .188 0.63(3) 1.60(3)

J438 2-15-85 RS-17 0.5 307 2 .186 1.06(4) 2.8(2)

J602 3-21-85 R-5 4.6 630 2 .201 1.17(3) 3.14(2)

J603 3 21-85 R-5 4.6 151 2 .176 0.57(21) 1.67(6)

J604 3-21-85 R5 4.6 122 2 .184 0.49(20) 1.48(7)

J605 3-21 85 R-5 4.6 91 2 .182 <0.1 0.45(20) -

J616 3 21-85 R-30 0.5 496 2 .198 1.86(3) 5.21(1)

J617 3-21-85 R 30 0.5 372 2 .192 1.78(3) 4.74(2)

J630 3 21-85 T-2 7.5 26 8 .189 0.29(30) 0.64(10)

Number in parenthesis 1$ the 10 counting error expressed as % of the value listed.

R 51 is a pond approximately 1 km from tne plant on land not connected to Clay Creek.

A*30 is a sump pond conn 0e*ted to Clay Creet Station RS-17 by an underground pipe.

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