ML18219D808

Response to Request for Information Concerning Vibratory Loads Originating from Positive Displacement Pumps, Associated with Chemical & Volume Control Systems

ML18219D808
Person / Time
Site:	Cook
Issue date:	08/08/1978
From:	Tillinghast J Indiana Michigan Power Co, (Formerly Indiana & Michigan Power Co)
To:	Harold Denton Office of Nuclear Reactor Regulation
References
Download: ML18219D808 (9)

Text

REGULATORY 1NFORMATION DISTRIBUTION SYSTEM (RIDS )

DlSTRIBUTION FOR INCOMING MATERIAL 0-3 i6 REC: DENTON H R ORG: T ILL INGHAST J DQCDATE: 08/08/78 NRC IN 5 MI PWR DATE RCVD: 08/30/78 DOCTYPE: LETTFR NOTARlZED: NO COPIES RECEIVED

SUBJECT:

LTR i ENCL i RESPONSE TO NRC LTR DTD 05/i.8/78... FURNISI]ING ADDL INFO CONCERNING VIBRATORY LOADS ORlGINATING FROM THL= POSITI'VE DISPLACEMENT PUMPS, ASSOCIATED WITH THE CHEMICAL AND VOLUME CONTROL SYSTEMS OF SUBJECT FACILITY"S... NOTARIZED 08/08/78... W/ATT INFO.

PLANT NAME: COOK UNIT REVIEWER INITIAL: XJ COOK UNIT 2 DISTRIBUTER INITIAL: /

DISTRIBUTlON OF THIS MATERIAL IS AS FOLLOWS NOTES:

I 8. E 3 CYS ALL MATERIAL GENERAL DISTRIBUTION FOR AFTER ISSUANCE OF OPERATING LICENSE.

(DISTRIBUTION CODE AOOi)

FOR ACTlON: BR CHIEF ORBSi BC++W/7 ENCL INTERNAL: G -

~W/ENCL NRC F'DR<+W/ENCL E~~W4g ENCL OELD4>LTR ONLY HANAUER<HFW/ENCL CORE PERFORMANCE BR4+W/ENCL AD FOR SYS 8c PRQJ<>W/ENCL, ENGINEERING BR4+W/ENCL REACTQR SAFETY BR+%W/ENCL PLANT SYSTEMS BR<4W/ENCL EEB~~W/ENCL EFFLUENT TREAT SYS>>W/ENCL J. MCGQUGI-H~wW/ENCL EXTERNAL: LPDR S ST. JOSEPH'I ++W/ENCL TERA ~H~W/ENCL NSIC~~W/ENCL ACRS CAT B~~+W/16 ENCL DISTRIBUTION: LTR 40 ENCL 39 CONTROL NBR: 782430098 SIZE: 3P+ip gR THE END

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D August 8, 197-5"i" AEP:NRC:0001,5 (

Donald C. Cook Nuclear Plant Unit 1 and 2 Docket Nos. 50-315 and 50-316 License Nos. DPR-58 and DPR-74 Hr. Harold R. Denton, Director Office of Nuclear Reactor'egulation U.S. Nuclear Regulatory Commissi,on Washington, D.C. 20555

Dear Nr. Denton:

This letter is in response to Nr. A. Schwencer's letter dated Nay 18, 1978, in which he requested additional information to vibratory loads originating from the positive displacement pumps,, associated with the Chemical and Volume Control Systems of the above captioned units. 'his response was to be sub-mitted. within 60 days of the date of the Hay 18,, 1978 letter, however, an extension of two-three additional weeks in our time to respond in this matter was requested and granted by N.

Mlynczakl of your staff.

In light of Nr. Schwencer's letter, CVCS Systems for both Unit and Unit 2 have been reviewed. Our responses 1 to the re-quest" for additional information is given below.

During performance of initial preoperational testing on Donald C. Cook Plant Units 1 8 2,: observations of the vibration levels on the reciprocating charging pump discharges were made and found to be acceptable. These observations were performed during various system preoperational tests as directed by operational testing acceptance criteria AC-000-001 which was developed to 'comply with. FSAR Section 13.1 and FSAR Response to guestions 4.7 and 4.30. The data generated by these tests for the rec'iprocating charging pump discharge is included as Table 1.

KILImEI17 MNLT HL'F7 782430098

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Mr. Harold R. Denton August 8, 1978 Our extended operating experience has confirmed that the vibration levels experienced on this system are acceptable, However, both units at the Donald C. Cook Plant have been ex-periencing some pressure pulsations on the reciprocating charging pump affecting the control systems'esponse. We have decided that pulsation dampening devices should be installed at the re-ciprocating pump discharge to reduce these pressure pulsations.

A specific vendor has not been chosen to provide these dampeners.

However, we anticipate vendor selection and issuance of a pur-chase order for these dampeners within 60 days of the date of this letter with normal delivery being 24 to 30 weeks thereafter.

We have evaluated the information requested in items 2 through 6 of Mr. Schwencer's letter and have concluded that since test data in this depth was not anticipated during preoperational testing, we do not have the specific information you requested.

Although the present vibration levels are acceptable, in our opinion addition of these pressure pulsation dampeners should have a beneficial effect on reducing pump induced piping system vibrations.

However, we will provide the information requested in item 1 to the NRC after veri'fication testing following installation of these dampeners.

Very truly yours, JT:em ce President Sworn and subscri'bed to before me this 8~day of August, 1978 i' New York County, New York.

Notary P GREGORY M. GURIGAN-Notary Public, State of New York No. 31-4643431 Qualified in New York County Commission Expires March 30,

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Mr. Harold R, Denton august', '1928 cc: R. C. Gal 1 en G. Charnoff P. W. Steketee R, J. Vollen R. Walsh D. V. Shaller-Bvtdgman R. W. Jurgensen

j0 TABLE 1 Results of Observed Displacements on Reciprocating Charging Pump Discharge Piping Observed Single Uncorrected Acceptance Double Amplitude Amplitude Hanger Span Criteria Inches inches Ft ~ inches UNIT 10 .18 10 .18 18 .6o Unit 2 1/8 .o63 10 .18 1/16 .032 10 .18 1/8 .o63 14. .36 0 0 7 F 10 0 0 5 .05 1/8 ~ 063 10 .18 1/16 .032 24. l.o8 1/32 .o16 5 .o5

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