ML20012B482

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Forwards Inservice Insp Pump & Valve Program Relief Request V-371 Proposing Alternate Acceptance Criteria Requirements for IWP-4150 for Fluctuations in Hydraulic Instrument Readings
ML20012B482
Person / Time
Site: Crystal River Duke energy icon.png
Issue date: 03/07/1990
From: Beard P
FLORIDA POWER CORP.
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
3F0390-08, 3F390-8, NUDOCS 9003150070
Download: ML20012B482 (3)


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1 March-7,_1990 3F0390-08 U.S. Nuclear Regulatory Commission

-Attention:- Document Control Desk Washington, D.C. 20555

Subject:

. Crystal River Unit 3 Docket No.--50-302 operating License No. DPR-72 Pump and. Valve Program (1983 Edition)

-Relief-Request No. V-371 Dear Sirt' By letter dated December 31, 1987, Florida Power Corporation (FPC).

' submitted an updated Pump' and Valve Program as required by the 1963 '

Edition - ' of ASME: Boiler and Pressure Vessel; Code,: Section XI,

. Article WA-1400(C). Included in that-submittal was Relief Request-

-V-370 which.after approval,' allowed:for-alternate inspections'on

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the Chilled Water System-in lieu of flow measurements. This relief was sought as a result of a degraded flow element. :On october 3,-

.1989,-FPC submitted Revision 9 to the-Pump and Valve Program which withdrew V-370 as a replacement, flow element has been installed.

Due . to low flow conditions in the design of the Chilled Water-

' System and the location and nature of the. flow element, hydraulic fluctuation ' cannot - be reduced to be 'within~ 2% of the required reading. Therefore, attached is Relief Request V-371.: This request proposes alternate acceptance criteria for the requirements

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- of IWP-4150 for' fluctuations in the hydraulic instrument readings.

Further information will be furnished in ' Licensee Event Report (LER)~90-003.

90031500709003Ob2 DR ADOCK 0500 {g'

.-GENERAL OFFICE: 3201 Thirty fourth Street South

  • P.O. Box 14042
  • St. Petersburg, Florida 33733. * (813) 866 5151 ll0 A Florida Progress Company

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  • March-7, 1990-3F0390-08
Page 2

-FPC has provided an advance copy of Relief Request-V-371 to your staff 'on . February 15, 1990 for their review. Your timely consideration on this request is greatly appreciated.

Sincerely,

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.M. Beard, Jr.

Senior Vice President Nuclear Operations-PMB:LVC:wla Attachments xc: : Regional Administrator, Region II

. Senior Resident Inspector i

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n FLORIDA POWER CORPORATION RELIEF REQUEST # l V-371-  :

INSERVICE INSPECTION - PUNP AND VALVE PROGRAN l i CRYSTAL RIVER UNIT 3 Page 1 of 1 I l l L Reference Code: ASME Boiler and Pressure Vessel Code, Section XI,1983 )

l edition through summer 1983 addenda, l  :

1. - Component For Which Exemption / Relief Is Requested:

L L a) Name and identification number (component tag): CHP-1A and CHP-18, 7 -Chilled Water Pumps, b) Function: To provide cooling water, as a heat sink, to various heat exchangers in the Auxiliary Building,. Control Complex, etc., for the purposes of maintaining set temperatures, c) ASME Section.III Code Class: 3.

d) Valve Category: N/A II. Reference Code Requirement That Has'Been Determined To Be Impractical:

IWP-4150; Fluctuations in hydraulic instrument readings are required to be within 2% of the observed reading.

III. Basis For Requesting Relief: The Chilled Water Pumps in the CR3 Pump and Valve Inservice Testing Program have not had flow measurement requirements imposed on them as allowed by Request for Relief V-370. In V-370, flow -

measurements were not required to be taken due to a damaged flow element.

Request V-370 was withdrawn, as.a result of a new element being installed, -

and flow measurements were subsequently imposed.

The design and operation of the Chilled Water System results in low flow conditions. The element used (CH-659-FE) to measure flow is an annubar ,

type that, under lower flow conditions, typically will indicate hydraulic -

fluctuations in measurement. This, coupled with the physical location of the element downstream of an elbow produces an indication of hydraulic fluctuation that cannot be reduced to be within 2% of the required reading. '

IV. Alternate Examination: Reduce the fluctuations in the hydraulic

instruments as intended by ANSI /ASME OMa-1988, Part 6, paragraph 4.6.1.5 to l assure the intent of " steady-state" conditions is met and then average the l- flow reading. Upon achieving the desired averaged flow reading, which shall be within 2% of the required reading, the remaining pump data will be gathered in accordance with Section XI requirements. '

l- V. Implementation Schedule: The alternate examination program requirements l

will be implemented on CHP-1A and CHP-1B immediately upon request approval.

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