ML20116L983
| ML20116L983 | |
| Person / Time | |
|---|---|
| Site: | Fort Calhoun  |
| Issue date: | 11/16/1992 |
| From: | Gates W OMAHA PUBLIC POWER DISTRICT |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| GL-89-13, LIC-92-330, TAC-M74004, NUDOCS 9211200001 | |
| Download: ML20116L983 (3) | |
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4" Omaha Pub!!c Power Dktrict 444 South 16th Street Mall Omaha, fJebraska G8102-2247 402/636-2000 November 16, 1992 LIC-92-330 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Mail Station Pl-13'i Washington, DC 20555
References:
1.
Docket No. 50 285 2.
Generic Letter 89 13, dated July 18, 1989 3.
Letter from 0 PPD (K. J. Morris) to NRC (Document Control Desk) dated January 26, 1990 (LIC-90 0050)
Gentlemen:
SUBJECT:
Generic Letter 89-13, Service Water System Problems Affecting Confirmation of Completion of Safety-Related Equipment Recommended Actions (TAC No.I74004) informed the NRC of planned In Reference 3, Omaha Public Power District actions pursuant to Generic letter (GL) 89-13(.0 PPD)ference 2 requested that each Re licensee confirm completion of all GL 89-13 recommer.ded actions or their justified alternatives within 30 days of implementation.
OPPD completed the implementation of the GL 89-13 actions on October 16, 1992.
This letter sati fies the 30 day notification requirement.
This letter also contains a summary of the GL 89-13 recommendations and the implemented actions at fort As noted in Reference 3, the service water sptem at FCS Calhoun Station (FCS)lude the Component Cooling Water (CCW) and Raw Water (RW) is considered to inc systems.
I.
Implemer.t and maintain an ongoing program of surveillance and control techniques to significantly reduce the incidence of flow blockage as a result of biofouling.
OPPD has implemented an annual visual inspection of the intake Structure for biological fouling.
The visual inspection includes draining down a particular RW pump cell, visually inspecting the area and collecting cell floor samples for additional analysis. The inspection activity (Wis administratively The pump cell inspection was first performed on February l'5),
controlled by the FCS Preventive Maintenance Program.
1990.
11.
Conduct a test program to irify the heat transfer capability of all safety-related heat exchangers cooled by service water.
Heat exchanger performance tests are conducted on the CCW heat cxchangers, the Shutdown Cooling heat exchangers, the Letdown Cooling heat exchanger and the Spent fuel Pool Cooling heat exchanger.
The performance tests vary in frequency from three to eighteen months depending on the type of heat exchanger. These testing activities are administratively controlled by the FCS PM Prog"am.
The initial stages of the test program began in 1993, and the program was fully implemented by October 16, 1992.
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U. S." Nuclear Regulatory Commission LIC-92-330 Page 2 111.
Ensure by establishing a routine inspection and maintenance program for open-cycle service water system piping and components that corrosion, erosion, protective coating failure, silting and biofouling cannot degrade the performance of safety related systems supplied by service water.
This action is being satisfied by a combinhtion of existing FCS programs.
The Preventative Maintenance Program, the Inservice Inspection Program and the Erosion / Corrosion Progiam all perform specific activities (including cleaning and inspections which collectively ensure that corrosion, erosion, silting and biofo)uling will not degrade the performance of the safety-related systenis cooled by the CCW and RW systems.
Initial inspections began in March 1990 and full implementation of these activitieswasachievedbyAugustI4,1991.
IV.
Confirm that the service water system will perform its intended function in accordance with the licensing basis for the plant.
OPPD completed four specific actions which confirmed that the CCW and RW systems will perform their intended function in accordance with the licensing basis for the plant.
1.
OPPD completed the design basis reconstitution for the RW and CCW systems which verified that system design capabilities meet the intended functions. This activity was completed on May 13, 1991.
2.
OPPD performed a post-accident single failure evaluation on the RW and CCW systems.
This was completed on April 7, 1992.
3.
OPPD conducted system walkdowns to recor.cile selected design basis open items.
These were completed on April 8, 1992.
4.
OPPD conducted RW and CCW system performance tests on all critical heat exchangers. These tests demonstrated that the systems perform as designed.
Testing and evaluation were completed on August 19, 1992.
V.
Confirm that maintenance practices, operating and emergency procedures, and training that involves the service water sv; em are adequate to ensure i
that safety-related equipment cooled by the service water system will function as intended and that operators of this equipment will perform effectively.
OPPD revised maintenance, operations and emergency procedures associated with the RW 'nd CCW systems as part of Safety Enhancement Program (SEP)
Items 41, 4L, and 49. The last of these items was completed on August 5, 1991.
To summar9e, the OPPD action plans in response to GL 89-13 required incremental imp 1 r..mtation over a period of time.
The final phases of the plans have now
'seen implemented. Therefore, OPPD considers all actions associated with GL 89-13 to be complete.
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U. S.-Nuclear Regulatory Connission LIC-92-330 Page 3 If you should have any questions, please contact me.
Sincerely
/k N../&&
W. G. Cates Vice President - Nuclear WGG/grc c:
LeBoeuf Lamb, Leiby & MacRae J. L. Mllhoan, NRC Regional Administrator, Regior, IV R. P. Hullikin, NRC Senior Resident inspector S. D. Bloom, NRC Project Manager
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