ML20039A263

Submits Info Re Procedures That Assure long-term Operability of Deep Draft Pumps,In Response to NRC 810824 Ltr.Addl Info Re Installation Procedures & Testing Requirements Will Be Sent Under Separate Cover

ML20039A263
Person / Time
Site:	Zimmer
Issue date:	12/11/1981
From:	Borgmann E CINCINNATI GAS & ELECTRIC CO.
To:	Harold Denton Office of Nuclear Reactor Regulation
References
NUDOCS 8112160434
Download: ML20039A263 (3)

Text

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Ti1E CINCINNATI GAS & ELECTRIC COMi%NY set CINCINN AT1, OHIO 4 5206 E. A. BORG MANN 6twion v'CE Pat &8 DENT Docket No. 50-358 December 11,_1981 Mr. Harold Denton, Director dk k$ gg Office of Nuclear Reactor Regulation 'l (

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U.S. Nuclear Regulatory Commission Washington, D.C. 20555 . v, OgO l <j A9 V d RE: WM. H. ZIMMER NUCLEAR POWER STATION f 'I r UNIT 1 - LONG TERM OPERABILITY OF  ;

DEEP DRAFT PUMPS

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Dear Mr. Denton:

This is in response to the August 24, 1981 NRC letter from Mr. R. L. Tedesco to Mr. E. A. Borgmann regarding the long term operability of deep draft pumps. Enclosed with that

' letter was a document entitled " Guidelines for Demonstration of Operability of Deep Draft Pumps." In that enclosure, deep draft pumps are defined as "usually 30 to 60 feet in length."

This definition compares to the Zimmer Pumps as follows:

Minimum Length - 30 feet (360")

Residual Heat Removal (RH) Pumps A, B & C 206 Low Pressure Core Spray Pump (LP) 260 High Pressure Core Spray Pump (HP) 282.88" Although the ECCS pumps installed at the Zimmer Station do not fall within the NRC's literal definition of deep draft pumps, i.t is our intent to adhere to the provisions described in the approved CG&E Maintenance and Surveillance Procedures that address the operability guidelines for deep draft pumps. CG&E believes that its approved Surveillance Test Procedures and~

Maintenance Procedures for these pumps demonstrate and assure the long term operability of these pumps.

Under separate cover, the following supplementary information is being sent directly to Mr. I. A. Peltier, Licensing Project Manager:

a. Installation procedures that are followed each time these pumps are disassembled and reinstalled.

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To: Mr. Harold Denton, Director December 11, 1981 Re: Wm. H. Zimmer Nuclear Power Station - Page #2 Unit 1 - Long Term Operability of Deep Draft Pumps Procedures:

ME. CMP.l.06 RH Pump Overhaul ME. CMP.l.07 HP Pump Overhaul These procedures describe in detail how to overhaul mechanical seals, disassemble the pumps, inspect and repair the pumps, reassemble the pumps and torque flanges.

Included in the procedures are detailed instructions for alignment of pump and motor shafts and specifications for bearing wear criteria.

b. Testing Requirements Procedures:

OP.SRH.511 LPCI (RH) Pumps Monthly ISI Checks OP.SHP.510 HP Pump Monthly ISI Checks OP.SLP.509 LP Pump Monthly ISI Checks These procedures are required by Surveillance Requirement 4.0.5 and are based upon ASME Section XI, Article IWP, Inservice Test Procedures. These tests will be run monthly and will obtain data on the following:

Inlet Pressure Bearing Temperature Differential Pressure Lubricant Inlet Temperature Flow Rate Pump Fluid Temperature Vibration Amplitude Acceptance criteria will be generated based upon initial test data and Section XI of the ASME code.

Very truly yours, THE CINCINNATI GAS & ELECTRIC COMPANY By E. A. BORGMANN EAB: dew cc: See Reverse Side State of Ohio )

County of Hamilton)ss Sworn to and subscribed before me this // #I day of December, 1981.

I^ M D MARGARET L HUBERD7m d [/My nem y ra.:. w e et ONo 13, 1533 N%aryPublic

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