ML092950485

Response to Request for Additional Information Associated with Inservice Test Program Relief Request Number PR-01

ML092950485
Person / Time
Site:	Ginna
Issue date:	10/16/2009
From:	Swift P Constellation Energy Nuclear Group, Ginna
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
PR-01
Download: ML092950485 (5)

Text

Paul Swift Swift R.E.

R.E. Ginna Ginna Nuclear Nuclear Power Power Plant, Plant, LLC LLC Manager, Manager, Nuclear Nuclear Engineering Engineering Services Services 1503 1503 Lake Road Road Ontario, New York Ontario, New York 14519-9364 14519-9364 585.771.5208 585.771.5208 585.771.3392 585.771.3392 Fax Fax Paul.swift@constellation.com Paul.swift@constellation.com 0 <"'\*

Constellation Energy" Nuclear Generation Nuclear Constellation Generation Group Group Energy*

October October 16, 2009 2009 U. S. Nuclear Nuclear Regulatory Regulatory Commission Washington, Washington, DC 20555 20555 ATTENTION:

ATTENTION: Document Control Document Control Desk

SUBJECT:

R.E. Ginna Nuclear N ucIear Power Plant Plant Docket No. 50-244 50-244

Response

Response to Request Request for Additional Information Associated Information Associated With With Inservice Inservice Test Program Program Relief Request Number ReJiefRequest Number PR-01PR-Ol

References:

(1) Letter Letter from P. Swift, Ginna Ginna LLC, to NRC Document Document Control Desk,

Subject:

Fifth Ten-Year Ten-Year Inservice Inservice Test Test Program Program for Safety-Related Safety-Related Pumps and Valves, Valves, dated dated September 11,2009.

11, 2009.

(2)

(2) Letter from D. Pickett, NRC, to J. Carlin, Ginna LLC,

Subject:

Request for Additional Information (RAI) Re: Relief Request No. PR-Ol, Additional PR-01, Revision 0, for the Fifth 10-Year Inservice Inservice Testing Interval - R.E. Ginna Nuclear Power Plant (TAC Testing Interval-NO. ME2239), dated October October 6, 2009.

On September 11,200911, 2009 R.E. Ginna Nuclear Power Plant, LLC (Ginna LLC) submitted relief request PR-01 associated with the Fifth Ten-Year Inservice Test Program for Safety-Related Safety-Related Pumps and Valves (Reference 1). On OctoberOctober 6, 2009 the NRC responded to that submittal with a request for additional information (Reference (Reference 2). Enclosed please find the response to the staffs staff's question.

commitments contained in this letter. Should you have questions regarding this There are no regulatory commitments matter, please contact Thomas Harding (585) (585) 771-5219, or thomas.hardingjr@constellation.com.

thomnas.hardingjrgconstellation.com.

Very truly yours, Swift Paul M. Swift

Attachment:

Response to Request for' for Additional Information Associated With Relief Relief Request Number PR-Ol PR-01 AJ4L7 (74 1.J'0 L'Ni q 6 - /00ý?0'03

Document Control Desk October 16, 2009 October Page 2 cc: S. J. Collins, NRC D. V. Pickett, NRC Resident Inspector, NRC

ATTACHMENT ATTACHMENT Response to Request for Additional Information Response Associated With Information Associated Request Number PR-Ol Relief Request PR-01 RE. Ginna Nuclear Power Plant, LLC R.E.

16, 2009 October 16,

ATTACHMENT ATTACHMENT

Response

Response to RequestRequest for Additional Information Associated Associated With Relief Request Number PR-Ol PR-01 Question Question It is the NRC staff's understanding understandingthat the diesel transferpumps PDG02A diesel fuel oil transfer PDGO2A and and PDGO2B PDG028 are positive displacement are displacement pumps. Please Please explain explain how the proposedproposedalternative alternative testing methodology utilizingutilizing the accuracy accuracy in design design analysis 4526-ME-20 meets the analysis EWR 4526-ME-20 recommendations recommendations as described described in NUREG-1482, NUREG-1482, Revision 1, Section 5.5.2.

1, Section 5.5.2.

Response

Ginna's Ginna's diesel fuel oil transfer pumps, PDG02A & & PDG02B, are positive displacement displacement pumps.

The flow rate for these pumps is determined determined by measuring measuring the indicated level change change in in the the diesel generator generator fuel oil day tank during a timed pump run and converting this data into fuel oil transfer pump flow rate for both the Group 8B and comprehensive comprehensive pump tests.

Level Gauges LG-2044 ("A" E DIG) and LG-2045 LG-2045 ("8" ("B" EE DIG) are utilized to measure the the change change in in indicated level while the fuel oil transfer pump is running and restoring fuel oil day tank level. 80th Both LG-2044 LG-2044 and LG-2045 (sight glasses equipped equipped with a reference scale in in inches of level) inches level) have a range of indicatedindicated level of 99 inches (2.5 inches to 11.5 11.5 inches).

The respective day tank is drained drained to an initial indicated indicated level of 5.0 to 5.5 inches before before initiating the fuel oil pump start. This level level is logged as the initial level. The pump is then started coincident coincident with with starting starting the stopwatch and the system allowed allowed to stabilize. A minimum 2 minute minute stabilization stabilization period is observed for the comprehensive comprehensive test.

Following a total minimum run time of 5 minutes (or exceeding Following exceeding an indicated tank level of 11 11 inches),

inches), the pump is stopped coincident coincident with stopping the stopwatch the. stopwatth and the day tank level is read in in inches to the nearestnearest 0.25 inch. This level is logged as the final level.

The change in in day tank level is determined determined in in inches and then converted converted to total gallons gallons pumped using the constant conversion conversion factor of 24.76 gallons per inch. The constant of 24.76 gallons per gallons per inch inch ofof indicated indicated level level on on the day day tank tank sight sight glass was established by EWR 4526-ME-20 based on the tank's geometrical ME-20 based on the tank's geometrical dimensions. dimensions.

i The total The total gallons gallons pumped pumped is is then then divided by the total total pump pump runrun time time to to arrive at the arrive at the pump pump test flow rate rate inin gallons gallons per minuteminute (gpm). This calculation calculation is documented documented in in the pump test procedures.

procedures.

The test circuit The test circuit for for each each pump is a fixed flow path from the storage tank (pump suction) to the the day tank (pump discharge).

day tank (pump discharge). Pump Pump suction suction pressure pressure is nearly constant because of the very small change in in storage tank level. This change change in in suction pressure during pump operation is is considered negligible.

considered negligible. The The normal normal rise rise in day tank level in day level is is approximately approximately 5.5 inches, which which corresponds to corresponds to aa quantity quantity of of approximately approximately 136 gallons pumped 136 gallons pumped during the the 55 minutes of pump pump operation, resulting in operation, in a typical typical flow rate rate of approximately approximately 27 gpm. The current flow rate rate reference values of each reference each pump pump are as follows: PDG02A - 27.2 gpm, PDG028 PDG02B - 27.1 gpm.

1I

ATTACHMENT ATTACHMENT Response to Request for Additional Information Associated Additional Information Associated With Relief Request Number PR-Ol PR-01 The small rise inin day tank level during pump operation does not affect pump discharge discharge pressure pressure or flow rate. This conclusion is supported supported by the discussion discussion inin NUREG 1482 Rev.1, section Rev.1, section 5.5.2, where the NRC states: "Pump discharge discharge pressure will match match system pressure up to the the shutoff head head of the positive displacement Because of the characteristics displacement pump. Because characteristics of a positive positive displacement pump, there should be virtually no change in displacement in pump discharge discharge flow rate as a result of the rising tank level.

of level. Therefore, Therefore, rising tank level will not have an impact on test results. By By having approximately approximately the same level in in the tank at the beginning beginning of each test, licensees licensees can achieve repeatable results."

The accuracy of level gauges, LG-2044 and LG-2045, is determined The accuracy determined using the nine (9) inch indicated range of level and the constant of 24.76 gallons per inch. This yields a total volume indicated volume change of 222.84 gallons. Based change Based on a readability uncertainty of +/- 0.125 inch (0.25 inch readability uncertainty scaling),

scaling), which isis equivalent equivalent to 3.10 gallons, divided by the total indicated volume of 222.84222.84 gallons, the overall accuracy accuracy of the sight glass is +/- 1.39%.

In addition, the stopwatch In stopwatch used to measure measure the time the pump is operating and pumping pumpirig fuel oil accurate to within +/-+/- 0.6 seconds per minute for a calibrated accuracy is accurate accuracy of +/- 1.0%. Combining

+/- 1.0%. Combining the accuracies accuracies ofof the the level level gauge sight glass and stopwatch, using the square square root of the sum of the squares method, results in in an overall indicated indicated accuracy accuracy of +/- 1.711.71%. overall accuracy

%. This overall unchanged from that which relief was granted is unchanged granted for during th 10-year during the 44th interval 1ST 10-year interval IST program.

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