ML20010G073

First Set of Interrogatories Directed to NRC Re Contention 21.Certificate of Svc Encl.Related Correspondence

ML20010G073
Person / Time
Site:	Allens Creek File:Houston Lighting and Power Company icon.png
Issue date:	08/24/1981
From:	Doherty J AFFILIATION NOT ASSIGNED
To:	NRC OFFICE OF THE EXECUTIVE LEGAL DIRECTOR (OELD)
References
NUDOCS 8109150296
Download: ML20010G073 (2)

Text

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UCLEAR R'GULATORT CG:: ISSICII 3/2" ' bV4 RV s - s 3 UClb TIIE ATO:4IC 3AP2TY '.7',

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.T gl HOUSTOI! LIGHTIIIG & P3UZR CO. Dochet I!o. 50JA' N (Allens Creek IIuclear Generating Station, Unit 1)

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II!222'il:!02 DOES2TY'S FIRST SET OF IIITER20GATO2IES TO STAFF OII COliTEUTIOH 221 . .

Cn Au ust 12, 1931, the Board admitted as an issue in Controversy this Contention, and specified in its Order of that date, that discovery be for 35 days. Fur-  !

suant to 10 CFR 2.740(b), Intervenor recuests they be answered in writing, and the person answering is recuested to identify themselves.

1 How much reactivity is calculated to 'oe introduced from the pressure spike observed as a result of the following transients? In addition, please give the per-cent void collapse if it is deterained. , ffT , ,

a. Main Stc a Ilation Valve Closure. Sf ,

b. Turbine trip with 105 bypass.

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c. Electric Load Rejection '4ithout byoass. -

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d. Recirculation Control Fa. 2re- Increasing Flow  ; Omca cf Ln.

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e. Loss of offsite power. J#@@ M -

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f. Turbine trip without b7Dass. '( , '-

g. 2ressure regulator fails Closed. [

2. h9at was the power core densit7 of the Peach Bottsm-II plant when the turbine trip tests (197?) were done as ow recorted in EPRI-HP-563?

63 g3 3. Does Stnff believe t'1is Intervenor through this issue 0

d ou has raised Task Action Flan (TAP) B-192 ':! hat differences

@$ are there if not? /o O

4. Why was the Applicant for the La Salle County nuclear plant g$ not recuired to analyze the I:SIV closure with ODYH but 80 ousu allowed to use the feodwater controller 2nd turbine event 3

@$* for thermal limit deteraination? This carty believes the IISIV closure transient is the most severe.

I!ote: See p. 4-23 of HUICG-0519, sER for LaSalle Cty. Plant

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5. 'l%y as uhe LOY code rejected by no :3C?

5. Have cny Commission licanac' ener3 ,r Mcin; reacto.a ever bect icrated duo to sus 7ected iaability to insert nerative reactivit:* sufficient to assure no more than 1.3 of the fuel rods go into boiling transition?

7. '.lhat (if any) conservations are built into the CDYU code?

8. Does Staff believe power core density is an unianortant variable in the calculati_n of reactivity insertion by colla,se of voids? On what docunents does Staff rely?

9. ( A) What is a Haling code of operation's (3) '. Thy is Haling ::de of operatior as importnnt assun7 tion sensi-tive for CDIU nodeling? (See itt:chment to Staff Pesnonse relevant to Contention J21 of 7/43/31)

10. What is the GT2AB safety limit for all transients stated in the Minimum Critical Fower Ratio (IICPR) " units"?

11. Does ODIU use the SCAT code to calculate the change in CPR for transient events?

12. Does Staff believe that the CDYU code will accurately pridict the cressure and cower soike above 6915 power for the trubine trip event? Were any Peach Bottoa tests at higher power conditicas?

13. Will the U2KIU code be cited in Staff testimony on this Contention? ........

J CJRTIFICA22 GT 3J2VICE Copies of "IUT2RV33CR DOH3dTY'3 FIRST GET OF II:T E R,GATORIES TO STAFF OH CC W23TIOU #21" were served on tPe below parties via First class U. S. Postal Service this of zugust, i 1931, from Houston, Texas; those narked with an asterisk (*)

were served by hand.

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Sbeldon J. '.lolfe, oso.. * , Dr. 3. Leonard Cheatum* , Gustave

! A. Linenberger*, Administrative Judges; J. Gregory Copeland, Esq.*, Robert Culp, Esq.*, Counsel for Appliemat; Gteven Schiaki, Esq.*, Counsel for Staff; Atomic Safety Licensing and Appeal Board, U.S.U.R.C. Docketing & Service Branch, the Several Intervening Farties.

Respectfully Submitted, x,

ohn F. Doherty, Intervenor i

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