ML19345G857

LER 80-059/04L-0:on 810316,deviations from Fall 1980 Environ Rept Noted.Cause Not Determined Conclusively.Study Will Continue.No Corrective Action Can Be Accomplished Until Cause Clearly Established

ML19345G857
Person / Time
Site:	Crystal River
Issue date:	04/14/1981
From:	Hernandez V FLORIDA POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19345G854	List: ML19345G853 ML19345G857
References
LER-80-059-04L, LER-80-59-4L, NUDOCS 8104220523
Download: ML19345G857 (3)

Text

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to i:110n 3/16/81 it_ was discovered that the Fall 1980 Environmental Report noted that one_

. ro .21 ( bottom replicate sampl'e was destroyed. Also biomass and abundance in the Control i f o i 1 I Basin (ETS 3.1.1); Gross Production, Net Production & Respiration Inner Discharge Bay t -

Io lsl I A and Juncus live and dead weight an'd Spartina live weight in the Discharge Marsh i lois1 I (ETS 3.1.2) deviated from pre-op monitoring by more than two sigma. No effect upon I Lol'J l the public health or safety.This is the 1st report for biomass, abundance. gross & netr oc>st I production and resoiration and the lith renort for Spartina and Juncas. I 175*14. CAust Cabst . C;we vagyg C;ct COCE StsC ct C vPC4E%r t :t susC I $b4C loisi 7 4 * ,

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i. .o i i The cause of th'is event has not been determined conclusively. The variations may i iseii [ be naturally occurring or they may be the result of the thermal output of CR#3.

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SUPPLEMENTARY INFORMATION

' REPORT NO,: 50-302/80-059/04L-0 3

FACILITY: Crystal River Unit #3 REPORT DATE: April 14,1981 OCCURRENCE DATE: Fall 1980 (Discovered at plant March 16,1981)

IDENTIFICATION OF OCCURRENCE: The fall 1980 environmental report noted that bottom core replicate sample SCA was destroyed during laboratory test-ing. Also biomass and abundance in the Control Basin de-viated from preoperational monitoring by more than two standard deviations. These events are contrary to Environ-mental Technical Specification 3.1.1. Gross production, net production and respiration in Inner Discharge Bay A and Juncus live and dead weight and Spartina live weight in the Discharge Marsh deviated from preoperational monitoring by more than two standard deviations. These events are contrary to Environmental Technical Specition 3.1.2.

CONDITIONS PRIOR TO OCCURRENCE: N/A DESCRIPTION OF OCCURRENCE: During the Fall of 1980, the above identified media devia-ted by more than two (2) standard deviations from the pre-operational program as shown in Table. 1. Also, one bottom core replicate saaple was destroyed during laboratory proces-sing.

DESIGNATION OF APPARENT CAUSE: It has not been determined whether the variations are a naturally occurring phenomena or if they are a result of the thermal output of the Crystal River site. The sample that was destroyed was due to a personnel error.

ANALYSIS OF OCCURRENCE: The data taken to date is inconclusive as to what effect Crystal River thermal discharge may be having on the local j ecosystems.

CORRECTIVE ACTION: The present study will be continued in order to monitor i changes in the local ecosystem. No corrective action can be identified until the cause is clearly identified. The report, referenced in LER 80-043/04L-1, sumarizing opera-tional data will be completed by December 1981 and may identify the cause.

FAILURE DATA: This is the eleventh occurrence for Spartina and Juncus, and l

the first report for biomass and abundance.

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1 TABLE 1 FALL 1980 PRE 0P MEAN PRESENT MEAN +20 SAMPLE AREA MEDIA 3.748 26.631 12.738 Control Basin MeanjenturiBiomass

- (g/m ) 333 Mean Venturi Abyndance 82 577 (Individuals /m')

Inner Discharge Gross Production 3.27 0.71 0.98 Bay A (g 0 2/m2d)

Net Production 1.20 0.52 0.20 (g 0 2/m2/d) 0.84 Respiration 2,07 0.19 (g 0 2/m2/d) 520- 1130 310 Discharge Marsh Juncug)

(g/m' live weight 860' 1094 360 Juncug)

(g/m- deadweight 970 232 Spartina live weight 560 (g/m2)