ML20247J874
| ML20247J874 | |
| Person / Time | |
|---|---|
| Site: | Brunswick  |
| Issue date: | 07/13/1989 |
| From: | Loflin L CAROLINA POWER & LIGHT CO. |
| To: | Ebneter S NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| Shared Package | |
| ML20247J876 | List: |
| References | |
| NLS-89-041, NLS-89-41, NUDOCS 8907310358 | |
| Download: ML20247J874 (6) | |
Text
.
.[k coat Carolina Power & Ught Company -
33 J1RR PlMIgg NLS-89-041 Mr. S. L D. Eii$eter, Regional Administrator l
United' States Nuclear Regulatory Commission 101 Marietta Street, NW l
-Atlanta,'GA 30303
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BRUNSWICK STEAM ELECTRIC PLANT, UNIT NOS. 1-AND 2 DOCKET NOS. 50-325 & 50-324/ LICENSE NOS. DPR-71'& DPR-62 NPDES PERMIT-REVISIONS AND VIOLATIONS
Dear Mr. Ebneter:
On~ March 11. 1983, the NRC issued Amendment Nos. 54 and 79 to the operating.
. licenses for Brunswick Steam Electric Plant (BSEP), Unit'Nos. 1 and 2.
The' amendments deleted license conditions and Appendix B Environmental Technical.
Specifications pertaining to certain nonradiological water quality-related requirements which are administered through the National Pollutant Discharge Elimination System (NPDES) permit. The NRC requested to remain informed about changes in the NPDES permit and violations requiring notification to the permitting agency.
Carolina Power & Light Company provided the NRC with this information until late 1986 when this agreement was inadvertently overlooked.
Subsequent.
actions have been taken to help prevent a similar. reoccurrence of this oversight.
In order for your records to be complete, CP&L is providing:
1.
Renewed NPDES permit (No. NC 007064) dated April 28, 1987.
2.
A report of fine mesh intake screen violations dated Novemb.tr 28, l988.
Should you have any questions regarding this submittal, please call Mr. W. R.
Murray at (919) 546-4661.
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Yours very truly, t
L. I. Lof in Manage q
j Nuclear Licensi g Section 1
DJK/ ors (211CRS)
End osures I
f cc Mr. E. G. Tourigny Mr. W. H. Ruland NRC Document Control Desk S
411 Fayettevitte Street
- P. O Boa 1551
- Aaleigh. N.C. 27602 j
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- 1...Me r 8907310358 890713 PDR ADOCK 05000324 p
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Cp&L i
I Carolina Power & Light Company Shearon Harris Energy & Environmental Center Route 1, Box 327 New Hill, North Carohna 27562 l
l Mr. Preston Howard, Jr.
NOV 211988 Regional Supervisor
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Wilmington Regional Office N.C. Division of Environmental Management j
7225 Wrightsville Avenue j
Wilmington, North Carolina 28403 j
RE: Brunswick Steam Electric Plant Fine Mesh Screens NPDES Permit No. NC0007064 i
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Dear Mr. Howard:
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Per discussion with Mr. J. M. McDowell, enclosed please find events, as i, that occurred during the fine-mesh screen outages from' July 15, l
1988 until September 19, 1988, at the Brunswick Steam Electric Plant.
The outages started when all the fine-mesh screened pumps tripped off line due to l
high differential pressure caused by large amounts of skeleton shrimp (Caprellid Amphipoda) plugging the screens.
The screens were damaged during removal, and delays in placing the screens back in service were caused by lack of spare screens, late delivery of spare screens, longer than anticipated I
machine work at local shops, and unanticipated breakage of operating I
screens.
Also, enclosed is a study that CP&L's Biology Unit has prepared entitled "Capre111d Amphipod Predictability Study" Enclosure 2, and " Clogging of Fine-Mesh Screens by Capre111d Amphipods", Enclosure 3.
It is hoped that by having a predictability study and a understanding.of the Caprellid Amphipods that similar incidents can be avoided in the future.
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In your discussion with Mr. J. M. McDowell, you expressed a concern about how to prevent this type of problem in the future.
This will be accomplished by demonstrating that a timely removal of the fine mesh screens can be performed without damage to the screens.
Hopefully, this will resolve your concerns in lieu of keeping extra screens in stock.
We will contact you to set up this demonstration, i
If you have any comments or questions concerning this letter or any of the attachments, please call Mr. J. M. McDowell at (919) 836-6920.
- truir, Yours, verb,gned Ey Onginat G. H. Warriner G. H. Warriner Manager Environmental Services RKM: des (88-11RKM)
Enclosures bee:
Mr. A. G. Cheatham III Mr. J. L. Harness Mr. C. E. Robertson
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I July 15, 1988 i
0001 Unit 1 shut down with 1C and 1D Circulating Water Intake Pumps (CWIPs) in-service.
Unit 2 at 99.9% power with 2A, 2B, 2C, and 2D CWIps. in-l service.
Five marb serem inattilsd on iB, it,,
1D, 2A, 2B, and 2C Cii1Ps.
l 0112 1B CWIP placed in-service.
l 0248 1B CWIP tripped high differential pressure.
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0250 1C CWIP tripped high differential pressure.
0251 1D CWIP tripped high differential pressure.
1 0252 1A CWIP started 3/8" mesh.
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0253 1B CWIP started fine mesh.
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0254 2A CWIP tripped.
1 0256 2A CWIP tripped.
0257 2C CWIP tripped.
0302 2B CWIP started - trippr,d.
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0304 2A CWIP started - tripped.
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0326 2A CWIP started - tripped.
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i 0337 2C CWIP started - tripped.
0408 2B CWIP started - tripped.
0820 2A CWIP started - tripped.
0920 2B CWIP started - tripped.
1137 2C CWIP started - tripped.
1306 2C CWIP started - t ipped.
1400 2B CWIP started with leads lifted for high differential pressure trip.
Manually tripped af ter differential pressure went off scale.
1430 A decision was made to remove fine mesh screen panels and operate with 3/8" mesh screens in order to meet the power demands on the system due to extremely hot weather.
88-14RKM
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l July 15, 1988, Cont'd
-j 1600 While removing screen's panels, large amounts of Capre111vas Amphipods were found on the screens and in the water by divers who were doing underwater checks of the screens.
1657 2B CWIP placed in-service with 50% 3/8" mesh screens and 50% fine mesh s creens. -
1 2003 2A CW7.< placed in-service with 3/8" mesh screens.
- July 16, 198t' 0010 2B C' IIP shut down due to screen coming apart.
0403 2C CWIP placed in-service with' 3/8" ' mesh ' screens.
0800 1D CWIP fine mesh screen panels removed.
August 1, 1988 i
0750 2B CWIP placed in-service with fine mesh screen panels installed on recently rebuilt spare traveling screen.
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August 9, 1988 0609 2C CWIP placed in-service with fine mesh screen panels installed..
August 12, 1988 1016 2A CWIP in-service with fine mesh screens installed.
August 14, 1988, 0250 to August 15, 1988, 1549 2A pump out-of-service due to shear pin failure on traveling screen drive motor.
l September 12, 1988 i
I 1B CWIP in-service with fine mesh screen panels ' installed. The 1B traveling' l
screen was completely overhauled due to extensive damage.
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2 September 19, 1988 i
0246 1D CWIP in-service with fine mesh screen panels installed.
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88-14RKM l
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.i Capre111d Amphipod Predictability' Study 1
1.0 PURPOSE I
To provide a method' of detecting significant number of. caprellid j
amphipods on or around the intake structure of the BSEP. Information is 4
to be provided to Operations.
2.0 OBJECTIVE Data will be collected to provide Operations with information to aid them in making informed and timely decisions:regarding the operation of fine-
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mesh screens on the intake traveling screens at the BSEP.
3.0 NATURE OF STUDY Entrainment and substrate (from the intake canal' and structure) samples will be collected and the density of capre111ds determined.
If 'a significant number of caprellids are detected, results will be reported '
to Operations.
4.0 LOCATION AND DURATION l
Sampling will be initiated when the salinity of the water in the intake, canal reaches and remains above 24 ppt (a' level preferred by caprellids)
' j for a period of eight days.
Entrainment samples will be taken from one-of the two discharge weirs..
If. sampling - occurs during the July September period, samples will be taken from the weir through which water.
A being filtered by a 3/8" mesh screen is flowing. ' Substrates from the intake canal near the intake structure-will be collected ; using a substrate sampler.
Consequently, any caprellids - clinging to the l
substrates will be collected.
Samples will continue on a regular basis until the salinity of the water in the intake canal decreases 'to below 24 ppt.
5.0 DATA MANAGEMENT REQUIREMENTS None 6.0 MANPOWER REQUIREMENTS Sample collection and laboratory analysis should require one person for two hours per sample.
Data analysis and report preparation - should require one person for two hours.
Total requirement' is one person for four hours per sample.
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I 88-14RKM
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