ML20235N865

Requests Addl Info Re 880728 Request to Delete Test 26, Dynamic Rod Drop Test & Test 27, Static Rod Cluster Control Assembly (Rcca) & Rcca Below Bank Position Measurements Test, from Startup Test Program

ML20235N865
Person / Time
Site:	South Texas
Issue date:	02/21/1989
From:	Dick G Office of Nuclear Reactor Regulation
To:	Goldberg J HOUSTON LIGHTING & POWER CO.
References
NUDOCS 8903020007
Download: ML20235N865 (14)

Text

- - - - _ _

. February 21, 1989 8

Docket No. 50-498 Mr. J. H. Goldberg Group'Vice-President, Nuclear Houston Lighting & Power Company P. O. Box 1700 Houston, Texas 77001

SUBJECT:

' REQUEST FOR ADDITIONAL INFORMATION REGARDING DELETION OF TEST NO. 26, DYNAMIC R0D DROP TEST, AND TEST NO. 27,.

STATIC RCCA DROP AND RCCA BELOW-BANK POSITION MEASUREMENTS TEST, SOUTH TEXAS PROJECT, UNIT 1 By. letters dated July 28, 1988, Houston Lighting &. Pcwer Company, in accordance with Secticr. 2.C(4) of the operating license, informed the staff that the subject tests were deleted from the plant Startup Test Program.

During our evaluation of the submittals, we' find that we need additional information'(see enclosures) in order to complete our review. Please have your staff contact me regarding the date for submittal of the requested additional information.

The reporting ar.d/or recordkeeping requirements contair.ed in this letter affect fewer than ten respondents; therefore, CMB clearance is not required under'P.L.96-511.

Sincerely,

/s/

George F. Dick, Jr., Project Manager Project Directorate - IV Division of Reactor Projects - III, ,

IV, V and Special Projects Office of Nuclear Reactor Regulation

Enclosure:

As stated cc w/ enclosure:

See next page l

DISTRIBUTION e Docket . File:.s NRC PDR Local PDR PD4 Reading L. Rubenstein J. Calvo P. Noonan G. Dick

'N. Chatterton M. Hodges OGC-Rockville E. Jordan B. Grimes ACRS (10) PD4 Plant File PD4/L ,P PM PD4/D pp/tri PNoon -GDick:sr JCalvo A I

02G\/89 02//f /89 02/n /89 N I 00000 boob 8

)

. 1

' February 21, 1989

. a Docket No. 50-498 3

Mr. J. H. Goldberg Group Vice-President, Nuclear Houston Lighting & Power Company P. O. Box 1700 Houston, Texas 77001 l I

Dear Mr. Goldberg:

I I

SUBJECT:

RECUEST FOR ADDITIONAL INFORMATION REGARDING DELETION OF l I

TEST NO. 26, DYNAMIC RCD DROP TEST, AND TEST NO. 27, STATIC RCCA DROP AND RCCA BELOW-BANK POSITION MEASUREMENTS TEST, SOUTH TEXAS PROJECT, UNIT I By letters dated July. 28,1988, Housten Lighting & Power Company, in accordance with Secticr. 2.C(4) of the operating license informed the staff '

that the subject tests were deleted from the plant Startup Test Program.

During our evaluation of the submittals, we find that we need additional information (see enclosures) in order to complete our review. Pleasc have your st6ff contact me regarding the date for submittal of the requested additional information.

The reporting ar.d/or recordkeeping requirements contained in this letter affect fewer than ten respondents; therefors, OMB clearance is not required under F.L.96-511.

Sincerely,

/s/

George F. Dick, Jr., Project Manager Project Directorate - IV Division of Reactor Projects - III, IV, Y and Special Projects Office of Nuclear Reactor Regulation

Enclosure:

As stated cc w/ enclosure:

See next page DISTRIBUTION Docket File NRC PDR Local PDR PD4 Reading L. Rubenstein J. Calvo P. Noonan G. Dick H. Chatterton M. Hodges OGC-Rockville E. Jordan ,

B. Grirnes ACRS (10) PD4 Plant File PD4/t PNocn u '

d P PM M ick:sr PD4/D ppvI JCalvo A l

0281/89 02//t /89 02/n/89 N 4

l 1

- - - - - - - . ------ _ -___ _ _ _ .]

e

%, UNITED STATES y > f, NUCLEAR REGULATORY COMMISSION 5 'E. WASHINGTON. D. C. 20555 February 21, 1989 Docket No. 50-498 Mr. J. H. Goldberg-Group Vice-President, Nuclear Houston Lighting & Power Cornpany P. O. Box 1700 Houston, Texas 77001

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION REGARDING DELETION OF TEST NO. 26, DYNAMIC ROD DROP TEST, AND TEST NO. 27, STATIC RCCA DROP AND RCCA BELOW-BANK POSITION MEASUREftENTS TEST, SOUTH TEXAS PROJECT, UNIT 1 By letters dated July 28, 1988, Houston Lighting & Power Company, in accordance with Section 2.C(d) of the operating licer.se informed the staff that the subject tests were deleted frori, the plant Startup Test Prograrr..

During our evaluation of the submittals, we find that we neeo additional information (see enclosures) it; crder to complete our review. Please have your staff contuct me regarding the date fcr submittel of the requested additional inferrr.aticr..

The reporting ard/or recordktteping requirements conteirieo in this letter t.ffect fewer than ten respondents; therefore, CFB clearance is not required uricer P.L.96-511.

Sircerely, Ge r . Dick, r., Project Manager Project Directorate - IV Divistor, cf Feactor Prcjects - III, IV, Y and Special Projects Office of Nuclear Reactor Regulation

Enclosure:

As stated cc w/ enclosure:

See next page l l

I l

l

4

. Mr. J. H. Goldberg South Texas Project Houston Lighting and Power Company l

cc:

Brian Berwick, Esq. Resident Inspector / South Texas Assistant Attorney General Project Environmental Protection Division c/o U.S. Nuclear Regulatory Commission {

P. O. Box 12548 P. O. Box 910  !

Capitol Station Bay City, Texas 77414 Austin, Texas 78711 Mr. Jonathan Davis )

Mr. J. T. Westermeier Assistant City Attorney J General Manager, South Texas Project City of Austin Houston Lighting and Power Company P. O. Box 1088 l P. O. Box 289 Austin, Texas 78767  ;

Houston, Texas 77483 Ms. Pat Coy Mr. R. J. Miner Citizens Concerned About Nuclear Chief Operating Officer Power City of Austin Electric Utility 10 Singleton 721 Barton Springs Road Eureka Springs, Arkansas 72632 ,

Austin, Texas 78704

-- Mr. M. A. McBurnett Mr. R. J. Costello Manager, Operations Support Licensing Mr. M. T. Hardt Houston Lighting and Power Company City Public Service Board P. O. Box 289 )

P. O. Box 1771 Wadsworth, Texas 77483 San Antonio, Texas 78296 Mr. A. Zaccaria Jack R. Newman, Esq. Mr. K. G. Hess Newman & Holtzinger, P. C. Bechtel Corporation 1615 L Street, NW P. O. Box 2166 Washington, D.C. 20036 Houston, Texas 77001 Melbert Schwartz, Jr., Esq. Mr. R. P. Verret l Baker & Botts Mr. R. L. Range One Shell Plaza Central Power and Light Company Houston, Texas 77002 P. O. Box 2121 Corpus Christi, Texas 78403 Mrs. Peggy Buchorn Executive Director Doub, Muntzing and Glasgow Citizens for Equitable Utilities, Inc. Attorneys at Law Route 1, Box 1684 Suite 400 Brazoria, Texas 77422 808 Seventeenth Street, N.W.

Washington, D.C. 20006 Mr. S. L. Rosen General Manager, Operations Support Houston Lighting and Power Company P. O. Box 289 Wadsworth, Texas 77483

Mr. J. H. Goldberg South Texas Project Houston Lighting & Power

.CC*

Regional Administrator, Region IV U.S. Nuclear Regulatory Commission Office of Executive Director i for Operations J 611 Ryan Plaza Drive, Suite 1000 j Arlington, Texas 76011 q Mr. Lanny Sinkin, Counsel for.Intervenor Citizens Concerned about Nuclear Power, Inc.

Christic Institute 1324 North Capitol Street Washington, D.C. 20002 Licensing Representative.

Houston Lighting and Power Company Suite 610

+-

'Three Metro Center Bethesda, Maryland 20814 Rufus S. Scott Associate General Counsel Houston Lighting & Power Company P. O. Box 1700 Houston, Texas 77001 INP0 Records Center 1100 Circle 75 Parkway Atlanta, Georgia 30339-3064 Joseph M. Hendrie 50 Bellport Lane Bellport, New York 11713 Gerald E. Vaughn, Vice President Nuclear Operations Houston Lighting & Power Company P. O. Box 289 Wadsworth, Texas 77483 R. W. Chewning, Chairman Nuclear Safety Review Board Houston Lighting & Power Company P. O. Box 289 Wadsworth, Texas 77483

, ENCLOSURE HOUSTON LIGHTING 8 POWER COMPANY RE00EST FOR ADDITIONAL INFORMATION DELETION OF STARTUP TESTS NO. 26 AND 27 The requests were made for the deletion of Test No. 26, Dynamic Rod Drop Test and Test No. 27, Static RCCS Drop and RCCA Below-Bank Position Measurements Test. These tests are routinely deleted for 12 foot Westinghouse cores.

STPEGS, however, is the first U.S. plant with a 14 foot core. As part of the justification for the deletion of these tests, the licensee stated that these tests have been performed in foreign reactors with 14 foot cores. In order to complete our review, we request test results from the foreign plants. Data similar to that provided for 12 foot cores in the Westin Merch 14,1984 (E.P. Rahe, Jr., to C.H. Berlinger, NRC) is ghouse letter for sufficient of the Dynamic Rod Drop Test. Similarly, data presented in initi41 Startup Reports like Salem Unit 2 will be sufficient for the Static RCCA Drop and RCCA Below-Eank Position Measurements. A copy of the appropriate portion of the Salem report is erclosed.

l l

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4.3 SUP 81.10 - STATIC RCCA DROP AND RCCA BELOW BANK POSITION M MEASUREMENTS 1

(

This test had the following objectives: j i

l 1) To determine the neutron flux distribution with a RCCA j below bank indication.

I l 4

2) To demonstrate the excore response to a RCCA below bank l indication.

3) To determine the neutron flux distribution when a RCCA has been " dropped" from the controlling RCC configuration.

4) To determine the worth of the most reactive RCCA " dropped" f rom the full power RCC configuration.

This startup procedure was performed at 50% power with Control Bank D rod 2D3 in core location H-12 (see Fig ur e 4. 3.1) . Pr io r to starting the test, a base case, all rods out, equilibrium E"'-

• xenon, flux map and a thermocouple map were taken.

The rod was " dropped" using a boron dilution. In order to drop the selected. rod, all the lif t coils in the bank containing the rod to be dropped were disconnected except the lif t coil for the selected rod. A dilution was then started at a rate of 15 gpm. The reactivity addition caused by the dilution was monitored using the reactivity computer, and the selected rod was stepped in to balance the reactivity change.

Reactor coolant system and pressurizer boron samples were taken every twenty minutes during the insertion. When the

" dropped" rod was fully inserted, a movable detector flux map was recorded in addition to a thermocouple map and excore detector data.

(

- 159 -

109D (2 ) : 32 m

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. The reactivity traces obtained during this test, in addition to chemical analysis and primary water integrator readings, were used to calculate the integral worth of the rod. Good 4

correlation was previously established between both the pri-mary water and the boric acid integrators and the amount of liquid added as measured by the induced reactivity perturba-

! tion. Employing these methods of determining the amount of i

reactivity added, it was found that the integral worth of

" dropped" rod was 100.5 pcm using the traces and 110 pcm using the integrator readings and analysis. Each of these values are well within the FSAR acceptance criteria of less

. than 250 pcm even after a 10% measurement uncertainty was

~

incorporated.

Figure 4.3.1 shows the location of the core of the dropped rod and its effects on the excore instrumentation and on T,yg. Figures 4.3.2 thru 4.3.4 show the effects of the dropped rod on power sharing and incore tilts.

s The maximum Nuclear Enthalpy Rise Hot Channel Factor (F AH) was measured to be 1.6384 satisfying the Core Design

. Report acceptance criteria of less than or equal to 1.68.

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