ML20116M541
| ML20116M541 | |
| Person / Time | |
|---|---|
| Site: | Vogtle  |
| Issue date: | 08/16/1996 |
| From: | Woodard J GEORGIA POWER CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| LCV-0821-B, LCV-821-B, NUDOCS 9608200197 | |
| Download: ML20116M541 (3) | |
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Georgia Power Company 333 Piedmont Avenue Atlanta. Georgia 30308 Telephone 404 526-3195 Maihng Adtess 40 inverness Center Parkway Post Omce Box 1295 Birmingham. Alabama 35201 Telephone 205 868 5066 J. D. Woodard
'ne sauthem e!*ttnc system Senior Vce President August 16, 1996 LCV-0821-B Docket Nos. 50-424 l
.50-425 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D. C. 20555 Gentlemen:
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VOGTLE ELECTRIC GENERATING PLANT REVISION TO TECHNICAL SPECIFICATION 4.8.1.1.2.j(2),
A. C. SOURCES In response to your request on August 12,1996, the following clarifications concerning 1
our request for a Technical specification change to the emergency diesel generator fuel oil i
system pressure test is provided as follows:
Diesel Fuel Oil Day Tank Truck Fill Line The day tank truck fill lines (line numbers 1/2-2403-L4-073 & 074) are a method of providing fuel oil to the day tanks via a fuel oil truck. The day tank tmck fill lines are not required to support an accident condition. However, GPC will insert a blank between the day tank and the day tank truck fill point. Therefore, it will not be necessary to pressure test or inspect this portion of the emergency diesel generator fuel oil system piping.
Pressure Relier Valve Discharge Lines The pressure relief valve discharge lines (1/2-2403-L4-061, 063, 065, & 067) are l ()
3 inch lines which route the discharge from the 2 inch discharge valves on each pump discharge pipe back to the fuel oil storage tank. The discharge lines are approximately
/YIld/
8 feet total in length containing two 90* elbows and are designed to the ASME Section III, Class 3 code requirements and seismic class I requirements. The relief valve is set to prevent the piping pressure from exceeding the piping design pressure. All isolation valves in the discharge piping to the day tank are locked open; therefore, for the O
9608200197 960816 PDR ADOCK 05000424 4
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. "Geo'rgia' Power 1
. U. S. Nuclear Regulatory Commission LCV-0821-B Page 2 setpoint of the relief valve to be reached, the discharge piping would have to be clogged. A strainer is located in the discharge piping which may become clogged causing the reliefvalve to lift Should this happen, the fuel oil level in the day tank would fall to the alarm setpoint notifying the operators of a problem. The pressure in the piping downstream of the strainer would also fall and ultimately start the second pump.
Subarticle IWD-5223, Item (e) of ASME Section XI states that "Open ended vent and drain lines from components extending beyond the last shutoffvalve and open ended safety and relief valve discharge lines shall be exempt from hydrostatic test." The discharge piping from the relief valve does not have flow under normal conditions and therefore does not require confirmation of adequate flow as required for open ended portions ofdischarge lines.
However, should the discharge piping from the relief valve leak it would be expected to be a small amount based on the low pressure of the system and the relative large discharge pipe size. The small leakage should not create a hazard or have en adverse effect on the fuel oil system in performing its design function to support the mitigation of an accident. A visual inspection of the exposed piping will be performed.
Fuel Oil Recirculation Lines The fuel oil recirculation lines (1/2-2403-L4-039 & 040) are open ended lines to the fuel oil day tanks. These lines will be visually inspected for leakage during operation of the respective emergency diesel generator.
Fuel Oil Pumn Test Lines The fuel oil pump test lines (1/2-2403-L4-049 & 050) are open ended lines to the respective fuel oil storage tank. Thse lines will be visually inspected for leakage during operation of a fuel oil transfer pump with flow through these lines.
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a dedrgi5 Power d U. S. Nuclear Regulatory Commission LCV-0821-B Page 3 Fuel Oil Transfer Pump Operation A fuel oil transfer pump will be operated to overflow the fuel oil day tank back to the fuel oil storage tank. After 10 minutes of pump operation in the overflow condition,-
the exposed overflow lines (1/2-2403-L4-066 & 068) from the day tank to the storage tank will be inspected for leakage.
Sincerely, k.--(
t 1
D.
odard JDW/ JAB /gmb i
cc: Georgia Power Company Mr. J. B. Beasley, Jr.
l Mr. M. Sheibani NORMS i
i U. S. Nuclear Reculatory Commission Mr. S. D. Ebneter, Regional Administrator Mr. L. L. Wheeler, Licensing Project Manager, NRR Mr. C. R. Ogle, Senior Resident Inspector, Vogtle l
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