IR 05000213/1990006
| ML20042G196 | |
| Person / Time | |
|---|---|
| Site: | Haddam Neck File:Connecticut Yankee Atomic Power Co icon.png |
| Issue date: | 04/13/1990 |
| From: | Anderson C, Woodard C NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | |
| Shared Package | |
| ML20042G195 | List: |
| References | |
| 50-213-90-06, 50-213-90-6, NUDOCS 9005110210 | |
| Download: ML20042G196 (4) | |
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[f U. S. NUCLEAR REGULATORY COMMISSION
REGION I
1 Report No. 50-213/90-06 f
Dock'et No. 50-213 L:
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License No. DPR-61
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. Licensee:
Connecticut-Yankee Atomic Power Company p
P.O. Box 270
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Hartford, Connecticut 06141 L
I Facility Name:
Haddam Neck Inspection At:
Haddam Neck Plant, Inspection Conducted:. March-14-16, 1990
' Inspectors:
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C. H. Woodard, Reactor ngineer date Approved by:
W-Au (6 _3 ()
i C.'J. Anderson.ChiefPlangSys4e'ms
'/ dats Inspection Summary: Routine Announced Inspection March 14-16,-1990
- (Inspection Report.50-213/90-06)
Areas Inspected: The inspection reviewed the licensee's program to ensure i
adequate quality of fuel oil for the emergency diesel generators to meet Technical Specification operational requirements.
Results: The licensee's program for the diesel fuel oil including the speci-fications, procurement and fuel chemistry requirements were deemed adequate. A
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concern was identified regarding the lengthy fuel analysis turn around time.
The licensee took-immediate-actions to address this concern.
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i 9005110210 900502
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l Details 1.0 Persons Contacted 1.1 Connecticut Yankee Atomic Power Company
- D. Miller, Nuclear Station Director
- E. Debarba, Nuclear Services Director
- M. Quinn, Chemistry Manager
- B. Danielson, Maintenance Manager
- D Ray, Operations Manager D. Willis,l0perations Shift-Supervisor J. Calderone, Engineering Manager S. Matthess, Chemist 1.2 U.S. Nuclear Regulatory Commission
- J. Shediosky, Senior Resident Inspector
- A. Asars, Resident Inspector
- Denotes those present at the exit meeting on March 16, 1990.
2.0 Emergency Diesel Generator (EDG) Fuel Oil (TI 2515/100)
2.1 Background Appendix B to 10 CFR 50 and Regulatory Guide (RG) 1.137 provide the regulatory requirements and an acceptable basis for a program to ensure the quality of the EDG fuel oil. Regulatory Guide 1.137 states that American National Standard Institute, ANSI N195-1976 should be used along with its supplement in establish-
- ing and implementing the fuel program. The supplement specifies that fuel oil to be used for filling or refilling the supply. tanks should meet ASTM specif1-cation D975-77, " Standard Specification for Diesel Fuel Oils," or-the recommenda-tions of the diesel generator manufacturer, if manufacturers standards are more restrictive.
Assurance of proper fuel oil requires purchasing the correct fuel oil and receipt inspection to verify that the fuel oil is proper prior to addition to the fuel storage tanks. Since oil degrades with time and biological growth and external sources contribute contamination, periodic inspection is important to assure the continued fuel oil quality. NRC Information Notice 87-04 " Diesel Generator Fails Test Because of Degraded Fuel" was issued to the licensee on January 16, 1987, to alert the licensee to the potential problem of fuel oil degradation. This inspection was performed to determine the licensee's program to ensure adequate quality of the EDG fuel oil.
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2.2 EDG Fuel Oil System Description The EDG fuel oil' system is comprised of two, 5000 gallon underground storage
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tanks which supply fuel to the two, 550 gallon integral EDG skid mounted
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day tanks by means of two transfer pumps.
Each of the two transfer pumps is powered from a different safety related bus to provide fuel for each of the two EDG units.
Procedures are provided to permit pumping of fuel from one diesel supply tank to. feed the other diesel generator in the event of the failure of the fuel supply to a diesel. An additional 42,000 gallons of fuel procured to
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the EDG fuel oil specifications is available from the main fuel storage tank to.
provide make-up fuel to the two, 5000 gallon tanks.
The fuel from the 42,000 gallon tank is pumped through an underground transfer line by either of two transfer pumps which are powered through an automatic bus transfer switch from-two' different safety related power sources.
The combined fuel supplies provide for EDG operation to meet the seven day (168 hour0.00194 days <br />0.0467 hours <br />2.777778e-4 weeks <br />6.3924e-5 months <br />) Technical Specification requirements.
EDG fuel is pumped from the day tanks by an electric fuel pump and a diesci
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engine gear driven pump.
These two pumps provide fuel pressure through the.
duplex' fuel filters to the engine fuel headers and to the injectors.
Both
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pumps run when the diesel starts, although either poinp is adequate for EDG operation.
Fuel in the day tanks is controlled by level switches which provide Li for pumped-make up fuel from the fuel storage tanks.
In addition to local
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indications and alarms in the EDG areas of fuel tank levels and fuel pressures, these alarms-actuate the EDG common alarm in the control room.
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2.3 EDG Fuel Oil Procurement and Periodic Sampling of Stored Fuel
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The procurement of fuel oil and periodic' sampling of stored fuel was covered by NRC Inspection Report 50-213/90-02.
The inspector observed that the 30 day time now required for fuel analysis could contribute to EDG unreliability in -
.the event that the fuel was unacceptable and the 5000 gallon EDG fuel tanks
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' required make-up fuel from unanalyzed fuel in the 42000 gallon tank. The licensee acknowledged this as a potential problem and took prompt corrective action to-implement the administrative changes which require the fuel oil to be analyzed within two weeks with verbal notification earlier if the laboratory-detects e fuel problem. The inspector had no further questions in this area.
g 2.4 Stored Fuel Oil Degradation Information Notice 87-04 addresses EDG surveillance failures as a result of fuel. oil system fouling, oxidation, and biological contamination. The inspector reviewed the licensee's evaluation relative to this potential problem as contained in the Northeast-Utilities Significant Operating Experience Report (NUSOER)
90-01, dated January 29, 1990. This report states that the Haddam Neck station superintendent should initiate actions to improve the EDG fuel program by April 30, 1990. These actions include the implementation of a particulate sampling program and the periodic checking of all tanks for water.
It also includes recommendations for the use of fuel additives to help stabilize the stored fuel for long term storage. By memorandum, dated February 27, 1990 the station superintendent directed the implementation of the NUSOER recommendation p7 F:
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'The licensee committed to the implementation of these programs by April 30, 1990,
with~the exception that the need for and the selection of fuel additives
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requires an evaluation which may not be completed by this date.
The' inspector
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had no further questions in this area.
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.i 2.5 Additional' Fuel Program' 0bservations-In order to assure the fuel tanks leak-tight integrity,_ the licensee conducted i
pressurized leak testing of'the 5000 gallon underground tanks in 1986 and 1988
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and is committed to an ongoing leak testing program which includes underground-fuel storage tank level readings each 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> for use in.a leak detection program, i
In order.to maintain clean fuel oil in the two, 5,000 gallon storage tanks, the-licensee has established a five year periodic schedule for pumping the stored
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fuel out, cleaning the tanks and refueling them with new fuel oil.
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2.6 Conclusions For the itemsLinspected, the licensee's emergency diesel generator fuel oil program and its implementation were deemed adequate to ensure the quality of the fuel oil.
3.0 Management Meeting Licensee management-was informed of the scope and purpose of the inspection at the entrance meeting on March 14, 1990.
The findings were discussed with the licensee representatives as indicated in paragraph 1.1 of this_ report at the March 16,1990 exit interview.
At no time.during the inspection was written material provided to the licensee by the inspector.
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