ML20072R669
| ML20072R669 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 09/01/1994 |
| From: | Hampton J DUKE POWER CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| GL-89-13, NUDOCS 9409130289 | |
| Download: ML20072R669 (5) | |
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Duke kwer Company J. W. Harna Oconee NuclearSite Vice President PO Box 1439 (803)88534990ffice Seneca, SC29ti79 (803)S8535MTax DUKEPOWER September 1, 1994 U.S. Nuclear Regulatory Commission Attention:
Document Control Desk Washington, DC 20555
Subject:
Oconee Nuclear Station Docket Nos. 50-269, -270, -287 Generic Letter 89-13 In the response to a deviation in NRC Inspection Report 93-25, Duke indicated that it would revise the initial response to Generic Letter 89-13.
Please find -attached a copy of the revised response for Generic Letter 89-13.
Very truly yours,
,/
[
/
,J.
W.
Hampton
/'Vice President Oconee Nuclear Station cc:
Mr.
S.
D. Ebneter, Regional Administrator U.
S. Nuclear Regulatory Commission, Region II Mr. L. A. Wiens, Project Manager Office of Nuclear Reactor Regulation Mr.
P.
E. Harmon Senior Resident Inspector i
Oconee Nuclear Site t r
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9409130289 940901 -
PDR ADOCK 05000269
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I Generic Letter 89 Service Water Systems Oconee Re-Response in answer to SWSOPI Inspection L $cussion:
Notice of Deviation dated 11 February 1994 as a result of Oconee's SWSOPI Inspection discusses Oconee's response to Generic Letter 89-13. The following re-response is in answer to that deviation.
ACTION I: SURVEILLANCE AND CONTROL INTAKE STRUCTURE INSPECTION Discussion of intake inspection at Keowee has been added to the Service Water Manual.
BIOCIDE ADDITION Discussion of biocide addition at Keowee has been added to the f
Service Water Manual.
FLUSHING AND FLOW TESTING j
Work on the Hydraulic Flow Model for the LPSW System has been l
completed and benchmarked.
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Work on the Hydraulic Flow Model for the CCW System has been completed and checked but has not.been benchmarked.
1 Work on the Hydraulic Flow Model for_the HPSW System has been completed and checked but not benchmarked.
Work on the Hydraulic Flow Model for part of the SSF has been l
completed and checked. Benchmarking is in progress as practical.
A Flush and video inspection has been performed on a typical l
section of seldom used, buried, large bore LPSW piping. Engineering evaluation concludes that similar piping has no problems of a magnitude that would prevent the piping from performing it's I
required function to mitigate an accident. This inspection will be repeated periodically.
System Flow testing has been expanded on LPSW and CCW on a Refueling Outage basis to assure flow and flow balancing.
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I A review and random inspections of Keowee service water systems by the Keowee and Raw Water Systems Engineers concludes that there are no stagnant raw water systems at Keowee with the exception of fire protection. Keowee Fire Protection is annually flushed and tested for flow and pressure requirements.
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Periodic testing serves as a flush on limited portions of the ASW (tornado) system at present.
Expanded testing on the section supplying the HPI pumps will be in place by 1 September 1995.
l Testing of the section to the Steam Generators is impractical at this time. Check valve inspection provides information as to the l
relative condition of this piping.
t SSF service water systems (HVAC, Diesel Engine and Aux Service Water) are periodically flushed as part of testing programs. A combined suction test has been performed with all three pumps operating simultaneously. Test frequency (combined test) is being evaluated for the future.
ACTION II: TEST PROGRAM OPEN-CYCLE SYSTEMS l
The Service Water Manual has been updated to add sections for Keowce and the SSF which were not included in the original manual.
Work is being done to prepare appropriate hardware and program modifications to fully include Keowee and the SSF in our Heat Exchanger Programs. These should be completed by 1 September 1995.
i CLOSED-CYCLE SYSTEMS No change INSTRUMENTATION No change TESTING AND CORRECTIVE ACTIONS No changes TESTING FREQUENCY Test programs are being revised to include Heat Exchangers from Keowee. Test programs have been developed for SSF Heat Exchangers.
Program changes should be in the Service Water Manual by 1 September 1995.
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SCHEDULE See Testing Frequency DOCUMENTATION l
The Service Water Manual has been revised to include Keowee and the SSF and will be further revised to include details of the Heat Exchanger programs as they are developed.
ACTION III: INSPECTION AND MAINTENANCE PROGRAM i
OPEN-CYCLE SERVICE WATER SYSTEM PIPING AND COMPONENTS Additional piping sections are being inspected as part of ongoing programs discussed in the Service Water Manual. This includes portions discussed in Design Study ONDS -252 and piping not included in ONDS - 252, such as Keowee, ASW (tornado) and the SSF.
REMOVAL OF FOULING MATERIAL No change REPAIR PROGRAM No change SCHEDULE No change DOCUMENTATION No change ACTION VI: CCNFIRMATION OF LICENSING BASIS The initial 1987 SITA inspection walkdown included only safety portions of LPSW and some portions of CCW. A more detailed walkdown inspection was performed in early 1993 on the LPSW System.
Walkdown inspections and other design basis confirmation activities such as single failure analysis and design basis documents will be completed on safety significant portions of other service water systems as appropriate by 1 September 1995, except as noted.
SSF system walkdowns by the System Engineer are complete.
The SSF does not fall under the single failure criteria and thus will not have a single failure analysis. The SSF design basis document for the HVAC system is complete. The SSF design basis document for the Aux Service Water Pump is scheduled to be complete by the 1 September 1995 date. The SSF design basis document for the Diesel system is scheduled to be complete by 1 December 1995.
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Initial SSF testing to demonstrate design basis is complete. This includes a reverse flow test from the steam generators and a test of the crossover piping between the Steam Generators. These will be repeated periodically.
A single failure analysis for Keowee will be produced as a part of the Keowee design basis document. The Keowee design basis document is in production at this time.
j A walkdown was completed on al.1 Keowee systems for conformance with flow diagrams in July 1994.
? low diagrams are currently in the update process.
Per the EFW design basis document, the ASW (tornado) system is not designed to be single failure proof. A walkdown of the ASW l
(tornado) system will be completed by 1 September 1995. The design basis documentation for ASW (tornado) system is part of the j
l A major revision of the single failure analysis of the ECCW as it supports the LPSW was completed in August 1994.
ACTION V: PROCEDURES AND TRAINING Our letter of April 20, 1994 in response to Inspection Report 50-269, -270, -287/93-25 provides our discussion on these issues.
The System Engineering program is added to our list of programs for assuring that procedures and training are consistant with our design basis.
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