ML20247H289

Concurs W/Util 890714 Request for Changes to Basis for Limiting Condition for Operation 4.2.2 of Facility Tech Specs Re Statement About Automatic Initiation of Backup Bearing Water Sys

ML20247H289
Person / Time
Site:	Fort Saint Vrain
Issue date:	09/06/1989
From:	Heitner K Office of Nuclear Reactor Regulation
To:	Robert Williams PUBLIC SERVICE CO. OF COLORADO
References
TAC-73930, NUDOCS 8909190269
Download: ML20247H289 (5)

Text

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..e September 6, 1989 L

Docket No. 50-267-i Mr.

R.' O. Williams, Jr..

Senior Vice President, Nuclear Operations Pub ~lic Service. Company of Colorado Post Office Box 840 Denver, Colorado. 80201-0840

SUBJECT:

CHANGE Ill BASIS FOR LC0 4.2.2 (TAC fv0. 73930)

We have reviewed your submittal dated July 14, 1989 concernirg changes you requested to the basis for LCO 4.2.2 of the Fort St. Vrain (FSV) Technical Specifications'(TS). The ma.ior change concerns the current statement in the basis of LCO 4.2.2 about. automatic initiation of the backup bearing water system (BUBW).

The BUBW is utilized at FSV to provide an alternative source of circulator bearir.g water. The BUBW is part of the FSV design, but was not specifically considered to be required as Class I, safe shutdown or a safety related system.

The current basis of LCO 4.2.2 specifically calls for the BUBW system to be automatically available as a backup to the normal bearing water systera.

You have stated that the BUBW can be operated in both a marual and automatic mode. The helium circulators are protected against dan. age f rom a loss of normal bearing watcr by the accumulator system, which allows safe coastdown of a circalavor following a loss of normal bearing water. Operational experience with the GUBW in the automatic rode shows that it is to more likely cause water ingress to the primary system, and does net preclude the circulator fron tripping on loss of ncrmal bearing water.

Hence, you have concluded that operation of BUBW in the manual mode is more desirable and docs not redece 4

uafety.

The s W # has reviewed your submittal uic concurs with your findings. Manual eferaticn of the BUEW provider ar. adequate titernativt to the normal bearing water supply.

Suitable ruisions to your procedutu will clicw the operators w o/

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Nr. R. O. Williams, Jr.. ~

.s' to restart the circulators on the BUBW should the normal supply fail. Thus, the staff concurs with your proposed change to the basis.of LC0 4.2.2.

A corrected TS page 4.2-2 is enclosed. Editorial changes you have requested are also. included.

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' Sincerely,

/Sl Kenneth L. Heitner, Project Manager Non-Power Reactor, Decommissioning and Environmental Project Directorate Division of Reactor Projects

-III, IV, V and Special Projects Office of Nuclear Reactor Regulation

Enclosure:

As stated cc w/ enclosure:

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Mr. R. O. Williams, Jr.. to restart the circulators on the BVBW should the normal supply' fail. Thus, the staff concurs.with your proposed change to the basis of LCO 4.2.2.

A corrected TS'page 4.2-2 is enclosed. Editorial changes' you have requested are also. included..

Sincerely, Kenneth L. Heitner, Project Manager Non-Power Reactor, Decommissioning and Environmental Project Directorate Division of Reactor Projects - III, IV, Y and Special Projects.

Office of Nuclear Reactor Regulation

Enclosure:

As stated cc w/ enclosure:

See next page i

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Mr. R. O. Williams, Jr.

.Public Service Company of Colorado Fort St. Vrain CC' Mr. D. W. Warembourg, Manager Robert M. Quillen, Director Nuclear Engineering Division Radiation Control Division Public Service Company Department of Health of Colorado 4210 East lith Avenue P. O. Box 840 Denver, Colorado 80220 Denver, Colorado 80201-0840 Mr. David Alberstein, Manager Mr. Charles H. Fuller Fort St.-Vrain Services Manager, Nuclear Production GA International Services Corporation and Station Manager Post Office Box 85608 Public Service Company of Colorado San Diego, California 92138 16805 Weld County Road 19-1/2 Platteville, Colorado 80651 Mr. H. L. Brey, Manager Nuclear Licensing and Resource Mr. P. F. Tomlinson, Manager Management Division Quality Assurance Division.

Public Service Company of Colorado Public Service Company of Colorado P. O. Box 840-16805 Weld County Road 19-1/2 Denver, Colorado 80201-0840 Platteville, Colorado 80651 Senior Resident inspector Mr. D. D. Hock U.S. Nuclear Regulatory Commission Pituident and Chief Executive Officer P. O. Box 640 Public Service Comnany of Colorado Platteville, Colorado 80651 Post Office Box 840 Denver, Colorado 80201-0840 Kelley, Standfield & 0'Donnell ATTft:

Mr.. J. K. Tarpey Commitment Control Program Public Service Company Building Coordinator Room 900 Public Service Company of Colorado 550 15th Street 2420 W. 26th Ave. Suite 100-0 D2nver, Colorado 80202 Denver, Colorado 80211 Regional Administrator, Region IV U.S. Nuclear Regulatory Commission 611 Ryan M aza Drive, Suite 1000 l

Arlington., Texas 76011 1

1 Chairman, Board of County Commissioners of' Weld County, Colorado i

Greeley, Colorado 60631 j

Regional Representative Radiation Programs Environmental Protection Agency 1 Denver Place 999 18th Street, Suite 1300 Denver, Colorado 80202-2413

Fort St. Vrain #1 Technical Specifications Amendment No. 28 - 10/5/82 Page 4.2-2 j

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(

Specification LCO 4.2.2 - Operable Circulator, Limiting Conditions i

for Operatior A circulator shall not be considered operable unless the following conditions or system requirements are met for the circulator:

a) Emergency Feedwater and Firewater are available to drive the water turbine and the capability for turbine water drainage exists. The Emergency Feedwater or Condensate Header may be inoperable for up to 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> without the helium circulators being considered inoperable.

b) The nonnal bearing water system is operable.

c) The associated bearing water accumulator system is operable.

d) Both Bearing Water Makeup Pumps are operable to provide required makeup. One of the bearing water makeup pumps may be inoperable for 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> without the helium circulators being considered inoperable.

1 Basis for Specification LCO 4.2.2 The requirements for an operable circulator specified above provide l

for adequate circulater water turbine supply and circulator euxiliary l

l supplia to assure safe s%tdown tooling. Operttion of two ch culators on ewrgency tendwater would provide adeounte haliuA circulation following I

a postulated depressurization recident.

Ea:h independent bearing water system provides a cor<tiscus supply of tearing water to the two circulators l

in each primary cooling loop.

In addit'.on, a backup bearing water system l1sprovidedwhichcanbeusedtointroducewatertothecirculatorsif the normal supply fails. Two gas pressurized bearing water accumulators (one each for the two circulators in each primary coolant loop) are provided.

REVISED BY THE NRC LETTER DATED pr.c ~ r r Joce E__

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