ML19329D635
| ML19329D635 | |
| Person / Time | |
|---|---|
| Site: | Crystal River  |
| Issue date: | 07/25/1977 |
| From: | Reid R Office of Nuclear Reactor Regulation |
| To: | Rodgers J FLORIDA POWER CORP. |
| References | |
| NUDOCS 8003160259 | |
| Download: ML19329D635 (4) | |
Text
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g JUL 2 51977 DISTRIBUT10ti:
Docket flRC PDR L PDR Docket No.:
50-302 ORB #4 Rdg.
RWReid RIngram CNelson JWetmore Floriaa Power Corporation Attorney, OELD ATTN:' Mr. J. 'T Rodgers,. Assistant Vice President 0I&E(3)
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'and fluclear Project Manager DEisenhut P.O. Box 14042 TBAbernathy
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St. Petersburg,' Florida 33733 JRBuchanan Gentlemen:
ACRS(16)
TCarter P.E: CRYSTAL RIVER UNIT !!O. ' 3 A large number of PWR H1gh Pressure and Low Pressure Safety In.ie: tion Systens -(HPSI and LPSI) utilize a conaon low pressure and a cre.:on high pressure header to feed the several cold (and in some cases not) leg injection points..tuintenance of proper flow resistance anc cressure dro? in t':e pioing syster. to eacn injection point is necessiry to:
(1) prevent total puup flow from exceeding runout cenditions vthen the
.systea is in its min _imum resistance configu-ation; (2) provide a proper flow split betkeen injection. points in accordance with the assumptions used in ths ECCS-LOCA analyses, and (3) provide an ecceptable level of total. ECCS flos to al.1, injection points: equal to or above that assumed in the ECCS-LCCA analyses. ilany plants have either manual or
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motor operated valve (s) in the. lines to each inj& tion point tnat have electrical or meclianical stops unich have been adjusted during pre-cperational testing of the plant.to ensure that these flos requi*ements are satisified.
In view of the safety function associated with the procer setting of
_ valves used to throttle flow in these systems, we consicer it appropriate that periodic verificatioh be'made of these valve p'sitions. Accordingly, o
we recuest that you determine if throttle valves ara usea to 00tain the required flow distribution in the liPSI or LPSI systens.
If throttle valves are used, we request that you propose changes to your tecnnical specifications to incorporate the surveillance _ require 2ents given in the enclosure.
In tna event valves are not utilized to throttle flou in your systems, you should advise 'us of this fact and no furtner action uill be required.
ELO 80031604I
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. Florida Power Corporation.
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The above action slioula bit ccepleted~within 60 days of receipt of this letter., In the event you should desire further discussion cf this matter, please contact us.
Sincerely, i
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i Robert W. Reid, Chief
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Cperating Reacturs tiranch #4 Division of Operating Reactors
Enclosure:
Techn,1 cal' Specifications
.cc w/ enclosure:
^ See next page
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NRC FORM 318 (9 76) NRCM 0240 W u. s. oovERNMENT PRINTING OFMCEs IBM = S26-624
2 Flortric Power Curporation cc:.Mr. S. A. Brandimore Vice President and General Counsel P. O. Box 14042 St. Petersburg, Florida 33733
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Crystal River Public Library Crystal River, Florida 32629 4
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SAMPLE SURVEILLANCE TECHNICAL SPECIFICATIONS FOR PWR HPSI AND LPSI SYSTEM THROTTLE VALVE STO?S 1.
The correct position of each electricel and/or mechanical position stop for the following throtzle valves shall be verified:
Within 4_ hours following completion of each-valve stroking a.
operation or maintenance on the valve when the HPSI or LPSI System is required to be operable.
b.
At least once per 18 months.
HPSI System LPSI System Valve humber Yalve Number 1.
1.
2.
2.
3.
3.
4.
4.
5.
5.
2.
A floa balance test shall be performed during shutdown to confirm the follosing minimum injection flo.t rates following completion of HPSI or LPSI system modifications that alter system flow characteristics:
l HPSI System - Single Pump LPSI System - Single Pumo Injection Leg 1_
gpm Injection Leg 1
gpm Injection Leg ____ 1_
spm Injection Leg cpm Injection Leg 1
gpm Injection Leg 1
gpa Injection Leg
[
gpm Injection Leg 1
gpm Bases-The purpose of these surveillance requirements is to provide assurance that proper ECCS flows will be maintained in the event of a LOCA.- Maintencnce of proper flow resistar.ce and pressure drop in the piping system to each injection point is necessary to:
(1) ppevent total pump ficw frca exceeding runout conditions when the system is in its minimum resistance configuration, (2) provide the prop-ar flow split between injection points in accordance with t's assumptions used in the ECCS-LOCA analyses, and (3) provide an acceptable level-of total ECCS flow to all injection points equal to or above that assumed 'in the ECCS-LOCA analyses.
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