ML19345C811

Nonroutine Environ Operating Rept 50-219/80-12:on 801122 During Reactor Shutdown W/Three Circulating Pumps in Svc, Water Temp in Discharge Canal Fell Below Lower Lethal Temp, Resulting in Fishkill.Blocking Devices Considered

ML19345C811
Person / Time
Site:	Oyster Creek
Issue date:	12/02/1980
From:	Finfrock I JERSEY CENTRAL POWER & LIGHT CO.
To:	Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
RO-50-219-80-12, NUDOCS 8012080420
Download: ML19345C811 (4)

Text

OYSTER CREEK NUCLEAR GENERATING STATION,, .

r.: _..

O

@A

_.- co - lna

• '^b

[L , _.. $h, D" * *b,lf uuesom M f8A g (609) 693-1951 P.O. BOX 388

• FORKED RIVER

• NEW JERSEY

• o8731 p2 j .o

$q 5 os December 2, 1980

• Mr. Boyce H. Grier, Director Office of hspection and Enforcement Region I United States Nuclear Regulatory Commission 631 Park Avenue King of Prussia, Pennsylvania 19406

SUBJECT:

Oyster Creek Nuclear Generating Station Docket No. 50-219 Nonroutine Environmental Operating Report No. 50-219/80-12 This letter forwards two copies of Nonroutine "1vironmental Operatirg Report No. 50-219/80-12 in compliance with paragrapn 5.6.2 of Appendix B to the Technical Specifications.

Very truly yours, Ivan . infr k, .

Vice Preside t-Generation IRF:dh Enclosures cc: Director (17 copies)

Office of Nuclear Reactor Regulations United States Nuclear Regulatory Connission Washington, D. C. 20555 c/o Distribution Services Branch, DDC, ADM l

.S * * " * ?%o -

. 0YSTER CREEK NUCLEAP _ RATING STATION Forked River . Jersey 08731~

Nonroutine Environmenta'. Operating Report No. 50-219/80-12 Report Date December 2, 1980 Occurrence Date November 22, 1980 Identification of Occurrence Fishkill-in Oyster Creek'during a shutdown of the Oyster Creek Nuclear Generating Station. Approximately 3638 Blue runner and Crevalle jack (Caranx chrysos and Caraax hippos),1038 Bluefish (Pomatomus saltatrix),17 Smooth dogfish (Mustelus canis), 3 Ladyfish (Elops saurus), 2 Northern kingfish (Menticirrhus saxatilis),

1 Gray snapper (Lutjanus griseus),1 American eel (Anguilla rostrata) and 1 Mojarra (Eucinostomus gula) were collected in Oyster Creek dead or in a severely stressed condition.

This event is considered to be a nonroutine environmental operating report as defined in the Technical Specifications, Appendix "B", paragraph 5.6.2.

Conditions Prior to 0ccurrence Prior to shutting down for maintenance the plant was operating as follows at 2100 hours0.0243 days <br />0.583 hours <br />0.00347 weeks <br />7.9905e-4 months <br /> on November 21:

Power: 628 MWe Dilution Pump Flow: 5.20_ x 105 gpm - 2 pumps Circulating Pump Flow: 4.60 x 10 gpm - 4 pumps Water temperatures were measured at 2130/ hours on November 21 as follows:

Location Temperature F ( C)

Intake 42.1 (5.7)

Discharge 62.4 (17.0)

U.S. Route 9 Bridge 48.7 (9.4)

Description of Occurrence The Oyster Creek Nuclear Generating Station began a controlled reactor shutdown at approximately 2200 hours0.0255 days <br />0.611 hours <br />0.00364 weeks <br />8.371e-4 months <br /> on November 21, 1980, consistent with OCETS condition 2.1.5. At approximately 2246 hours0.026 days <br />0.624 hours <br />0.00371 weeks <br />8.54603e-4 months <br /> one dilution pump was shut off and at 2249 hours0.026 days <br />0.625 hours <br />0.00372 weeks <br />8.557445e-4 months <br /> the second operating dilution pump was taken out of service. At 2253 hours0.0261 days <br />0.626 hours <br />0.00373 weeks <br />8.572665e-4 months <br /> one circulating water pump was taken out of service leaving three in operation. By 0730 hours0.00845 days <br />0.203 hours <br />0.00121 weeks <br />2.77765e-4 months <br /> on-November 22 no further heat was being rejected and water temperatures were as follows:

m ._ . .

,-,,r -_' I

-c- . ,

9

y Nonroutine Environmental Operating Report No. 50-219610-12 Page 2.

Location Temperature *F (*C)

Intake- 42.1 (5.7)

Discharge 42.7 (6.0)

U.S. Route 9 Bridge 42.6 (5.9)

At approximately 0040 hours4.62963e-4 days <br />0.0111 hours <br />6.613757e-5 weeks <br />1.522e-5 months <br /> on November 22, the Blue runner and Crevalle jack which were observed swimming in the condenser discharge began to show signs of severe stress. The discharge temperature at that t%e was approximately 55 F (12.9*C). At approximately 0300 hours0.00347 days <br />0.0833 hours <br />4.960317e-4 weeks <br />1.1415e-4 months <br />, when the c adenser discharge temperature had dropped to approximately 47.5*F (8.7 C), deac. Blue runner and Crevalle-Jack were observed floating-down the discharge canal and began to appear on the banks of Oyster Creek. By 0630 hours0.00729 days <br />0.175 hours <br />0.00104 weeks <br />2.39715e-4 months <br />, the discharge temperature was 45.2 F (7.4 C) and Bluefish began appearing on the creek banks. The Blue runner and Crevalle jack were apparently all dead by daylight on November 22, however, the Bluefish continued to appear on the beaches until'approximately 1100 hours0.0127 days <br />0.306 hours <br />0.00182 weeks <br />4.1855e-4 months <br /> after which time little additional mortality was observed.

Surveys of the banks of Oyster Creek were conducted late in the evening on November 21 and throughout the day on November 22. In addition, trawl samples were taken on November 23 at the mouth of Oyster Creek and in the residential lagoons on the south side of the Creek.

The following is a summary of the number of dead fish collected with average fork length and weight where available:

Average Average Species Numtar, Fork Length (mm) Weight (Kg)

Blue runner ) 206.1 0.18 3638 Crevalle Jack ) 173.0 0.14 Bluefish 1038 266.5 0.28 Smooth dogfish 17 600.9 0.74 Ladyfish 3 292.7 0.30 Northern kingfish 2 Gray snapper 1 118.0 American eel 1 Mojarra 1 221.0 Apparent Cause of Occurrence

- The pater temperature in the discharge canal fell below the lower lethal tempera-ture for the affected species following plant shutdown.

L Analysis of Occurrence A review of the literature on the affected species reveals that Blue runner and Crevalle jack will die when water temperatures are lower than 50 F(10 C) and  :

Bluefish when temperatures are lower than 37.9 to 47.3*F (3.3 to 8.5 C). Lower lethal temperatures are not readily available for the other affected species, however, data on. their distribution indicates that most would not be expected to occur.in Barnegat Bay u the prevailing ambient temperatures and cold shock is the most probable cause of. death.

Nonroutine Environmentalf 0perating Report No. 50-219/80-12'- ' Page 3

. Corrective Action l Since'no further mortality is' expected.on'the affected' species and no other species .should be stressed or die, no immediate corrective action will be taken.

, _JCP&L is currently investigating.the feasibility of installing blocking devices-

in the discharge . canal in order to divert fish that might be attracted to the heated discharge.

Failure Data Not Applicable.

1 J

1 i

l J --

A Y

-,e 4 se .

wi# v. m m,. . p g'.m e . w , m,.e + - -Ewm - ei* - .e.,-e" ----# .

. - - - -'.. , . , _. . . _.,, , , C .. . . . _ _