ML20128P795

Ack Receipt of Util 920928 Response to GL 92-04, Resolution of Issues Re Reactor Vessel Water Level Instrumentation in Bwrs. Lists Items Found Acceptable in Response

ML20128P795
Person / Time
Site:	Duane Arnold
Issue date:	02/18/1993
From:	Pulsifer R Office of Nuclear Reactor Regulation
To:	Leslie Liu IES UTILITIES INC., (FORMERLY IOWA ELECTRIC LIGHT
References
GL-92-04, GL-92-4, TAC-M84278, NUDOCS 9302250104
Download: ML20128P795 (5)

Text

4

'o,, UNITED STATES

! n NUCLEAR REGULATORY COMMISSION B e I wAsHINotoN. o. c. rosss e

february 18. 1993 i

Docket No. 50-331 I Mr. Lee Liu Chairman of the Board and Chief Executive Officer lowa Electric Light and Power Company Post Office Box 351 Cedar Rapids, Iowa 52406

SUBJECT:

RESPONSE TO GENERIC LETTER 92-04 " RESOLUTION OF THE ISSUES l RELATED 10 REACTOR VESSEL WATER LEVEL INSTRUMENTATION l IN BOILING WATER REACTORS" (TAC M84278) l This letter acknowledges receipt of your response to Generic letter (GL) 92-04, dated September 28, 1992. GL 92-04 was issued by letter dated

August 19, 1992, to all operating Boiling Water Reactor (BWR) Licensees.

GL 92-04 requested licensees to promptly assess the impact on their facilities of potentially erroneous level indication due to non-condensible gases, and to implement compensatory measures and long term corrective actions as necessary.

We find acceptable:

(1) Duane Arnold Energy Center (DAEC) review and acceptance of the BWR Owners Group (BWROG) generic analysis as being applicable to DAEC.

(2) DAEC endorsement of the BWROG commitment, outlined in its letter dated August 12, 1992, regarding schedule and plans for actions to address l postulated errors in BWR water level instrumentation.

(3) DAEC endorsement of the BWROG's Emergency Procedures Committee guidance letter dated August 19, 1992. This letter provides guidance for operator action in the event of level indication errors due to non-l condensible gases during RPV depressurization. We also understand that you have sensitized your operators to these potential errors consistent with the BWROG guidance.

l (4) DAEC commitment to implement the longer term BWROG finding resulting from their experimental and analytical programs on a schedule consistent l with the BWROG program, as documented in their letter of August 12, l 1992, and discussed at the October 29, 1992, meeting with the NRC, 220054 p OO i ile d" <* ' #U d " "* E I h P

l

Mr. Lee Liu February 18. 1993 On October 23, 1992, the BWROG approved refined operator guidance developed by the Emergency Procedures _ Committee, sent to your Operations Superintendent on October 16, 1992, for response to instrument errors due to non-condensible gases. We feel that this guidance provides appropriate information for operators to adequately identify and deal with potentially inaccurate RPV level instrumentation, and. expect that this or equivalent guidance, has been incorporated into your station operations.

Should you have any questions, please contact me at (301) 504-3016.

Sincerely, 77

[

j sobert M. Pulsifer, Project Manager-

/. Project Directorate'lll-3 Division of Reactor Projects Ill/IV/V Office of Nuclear Reactor Regulation cc: See next page L

l a

e 1-"*'" + - --

I Mr. Lee Liu lowa Electric Light and Power Company Duane Arnold Energy Center CC:

Jack Newman, Esquire Kathleen H. Shea, Esquire Newman and Holtzinger 1615 L Street, N.W.

Washington, D.C. 20036 Chairman, Linn County Board of Supervisors Cedar Rapids, Iowa 52406 lowa Electric Light and Power Company ATTN: David L. Wilson Plant Superintendent, Nuclear 3277 DAEC Road Palo, Iowa 52324 Mr. John F. Franz, Jr.

Vice President, Nuclear Duane Arnold Energy Center 3277 DAEC Road Palo, Iowa 52324 Mr. Keith Young Manager, Nuclear Licensing Duane Arnold Energy Center 3277 DAEC Road Palo, Iowa 52324 U.S. Nuclear Regulatory Commission Resident inspector's Office Rural Route #1 Palo, Iowa 52324 Regional Administrator, Region ill U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137 Mr. Stephen N. Brown Utilities Division Iowa Department of Commerce Lucas Office Building, 5th floor Des Moines, Iowa 50319

=

d. 6

=

Mr. Lee Liu February 18. 1993 ,

i On October 23, 1992, the BWROG approved refined operator guidance developed by the Emergency Procedures Committee, sent to your Operations Superintendent on  ;

October 16 1992, for response to instrument errors due to non-condensible i gases. We feel that this guidance provides appropriate information for operators to adequately identify and deal with potentially inaccurate RPV level instrumentation, and expect that this or equivalent guidance, has been incorporated into your station operations.

Should you have any questions, please contact me at (301) 504-3016. .

Sincerely, original signed by Jon Hopkins for Robert M. Pulsifer, Project Manager Project Directorate-lll-3 Division of Reactor Projects 111/IV/V Office of Nuclear Reactor Regulation cc: See next page DISTRIBUTION _

sDocket: File ~'

PD3-3 Reading NRC & Local PDRs JRoe JZwolinski JHannon PKreutzer RPulsifer JClifford ACRS (10)

Region Ill, DRP PD3-3 Gray 0FFICE PDill-3:LA:DRPW PDill-3:PM:DRPV P0lllND:DRPW NAME PKreutzerdid- RPul si fer/rmp/bj JHannhl ,

DATE 1 / d /93 $L. /1 7/93 N 9,//[93--

OfflCIAL RECORD DOCUMENT NAME: g:\duanearn\dua84278.LTR a

in4 -s.y v- U-Tf-T- -wvvrr-*y i.yar-p-ew-- - Y =- e

T l

C Mr. Lee Liu February 18, 1993 On October 23, 1992, the BWROG approved refined operator guidance developed by the Emergency Procedures Committee, sent to your Operations Superintendent on October 16, 1992, for response to instrument errors due to non-condensible gases. We feel that this guidance provides appropriate information for .

operators to adequately identify and deal with potentially inaccurate RPV level instrumentation, and expect ', hat this or equivalent guidance, has been incorporated into your station operations.

Should you have any questions, please contact me at (301) 504-3016.

Sincerely, original signed by Jon Hopkins for Robert M. Pulsifer, Project Manager Project Directorate 111-3 Division of Reactor Projects Ill/IV/V Office of Nuclear Reactor Regulation cc: See next page DlSRLBUTION

Docket File PD3-3 Reading NRC & Local PDRs JRoe JZwolinski JHannon PKreutzer RPulsifer JClifford ACRS (10)

Region lil, DRP PD3-3 Gray OfflCE PDill-3:LA:DRPW PDill-3:PM:DRPW PDill D:DRPW NAME PKreutzered RPulsifer/rmp/bj JHannh/

DATE i //7 /93 A/17/93ht- _ hh93 0FFICIAL RECORD DOCUMENT NAME: 9:\duanearn\dua84278.LTR

.