ML20246K134

Forwards Revised SER for Hydrogen Water Chemistry Control Sys.Root Cause of Recently Reported Cracking in Stainless Steel Piping at Dresden Unit 2 Should Be Resolved Before NRC Can Consider Granting Inservice Insp Relief

ML20246K134
Person / Time
Site:	Quad Cities
Issue date:	08/24/1989
From:	Ross T Office of Nuclear Reactor Regulation
To:	Kovach T COMMONWEALTH EDISON CO.
Shared Package
ML20246K138	List: ML20246K134 ML20246K161
References
TAC-69422, TAC-69423, NUDOCS 8909050388
Download: ML20246K134 (4)

Text

-- --

hocked %

~.

v

!( Q o

UNITED STATES g

NUCLEAR REGULATORY COMMISSION Tf, ? ' M WASHINGT ON, D. C. 20555 K

c Q.

e i

(

\\.%r,/

August 24, 1989 i

Docket Nos. 50-254 and 50-265 e

Hr. Thomas J. Kovach Nuclear Licensing Manager Commonwealth Edison Company Post Office Box 767 Chicago, Illinois 60690

SUBJECT:

REVISED SER FOR THE HYDROGEN WATER CHEMISTRY CONTROL SYSTEM (TAC NOS. 69422 AND 69423)

References:

(a) Letter from T. Ross (NRC) to H. Bliss (Ceco) dated January 18, 1989 (b) Letter from R. Stols (CECO) to Dr. Murley (NRC) dated May 1, 1989 On May 11 and 12, 1989, the NRC staff conducted a post-installation (pre-operational) followup inspection of the Hydrogen Water Chemistry (HWC) program being implemented at the Quad Cities Nuclear Power Station (QCNPS).

The results of this inspection were documented in the Region III resident inspector's regular inspection report for QCNPS.

By reference (a), the staff issued a safety evaluation report (SER) regarding the HWC program at QCNPS. Since then, in reference (b), CECO provided updated revisions to reports titled, "HWC Installation Report for Amendment to the Facility Operating License," and "HWC Installation Compliance with EPRI Guidelines for Permanent BWR HWC Installations - 1987 Revision," both of which had been used (and referenced) as technical bases for the SER in reference (a).

These reports were revised to encompass the final (as-built) configuration of the HWC System at QCNPS, and provide comments on the staff's SER.

Based upon the aforementioned on-site inspection, and a review of reference (b), NRC staff revised its previous SER and enclosed it herein. The enclosed SER completely supersedes the SER contained in reference (a). Changes made to the enclosed SER dio not affect the staff's original conclusions about the HWC program at QCNPS.

During the fourth quarter of 1990, CECO intends to request HWC credit for inservice inspection relief of recirculation system piping.

In regards to this request, NRC staff recommended at the QCNPS exit meeting that CECO - (1) take appropriate measures to ensure water chemistry in the side loop (containin Electrochemical Potential (ECP) probes and crack arrest verification (CAV)g the system corrosion specimens) is representative of water chemistry in the OM 8909050388 890824 PDR ADOCK 05000254 1 t i

P FDC i

i

____-__--__--___.a

+

r L*

Mr. Thomas J. Kovach 2-

~

recirculation piping, and (2) determine the root cause of recently reported cracking in stainless steel piping at Dresden' 2 which has been operating with HWC since 1983.

Both'of these issues should be resolved before the staff will consider granting inservice inspection relief.

It was further suggested that Ceco monitor QCNPS crack growth of existing non-repaired cracks, in a fashion g

similar to that conducted at Dresden. This method can directly determine M

effectiveness of HWC on actual plant cracks.

Sincerely,

/

Thierry M. Ross, Project Manager-Project Directorate III-2 Division of Reactor Projects - III, IV, V, and Special Projects Office of Nuclear Reactor Regulation

Enclosure:

Safety Evaluation Report ec w/ enclosure:

See-next page 1

J

c.7,, - y y _ ;.l ff, F

y August 24, 1989 LMr. Thomas J. Kovach,

h m

recirculation piping, and (2) determine the root cause of-recently reported jJ cracking.in stainless steel piping at Dresden 2 which has been operating with' E,.

HWC since 1983. ~Both of these-issues-should be resolved before the staff will.

consider granting inservice inspection relief.

It was further suggested that CECO monitor QCNPS crack' growth.of existing non-repaired cracks, in a fashion p

.similar'to that conducted at Dresden. This method can.directly determine effectiveness of HWC. on actual plant cracks.

Sincerely, 5

Thierry M. Ross, Project Manager Project Directorate 111-2 Division of Reactor Projects - III, IV, V, and Special: Projects Office of Nuclear Reactor Regulation

Enclosure:

DISTRIBUTION:

Safety Evaluation Report DocketFile(50-254/265)

NRC/ Local PDRs cc'w/ enclosure:

PD32 Reading See next page MJVirgilio LLuther TRoss OGC(FYI)

EJordan BGrines -

FWitt ACRS(10)

Gray File

/

'LA:Pb32 g -

TRoss:samPM:PD32g (A)D:PD32[*f-LLuther PCShemanski 8/.'2//89 8/2,/89 8/$89 r

'0FFICIAL RECORD COPY

(.'

.______________.m_

1 Q.., 7. :,.

Mr. Thomas & Kovach.

Quad Cities Nuclear Power Station Commonwealth Edison Company Units I and 2-cc: --

Mr. Stephen E. Shelton Vice' President-Iowa-Illinois Gas-and Electric Company

. P. O. Box 4350 l:

Davenport, Iowa 52808 Michael I. Miller, Esq.

Sidley and Austin

- One First National Plaza Chicago, Illinois 60603 Mr. Richard Bax Station Manager Quad Cities Nuclear Power Station 22710 206th Avenue North Cordova, Illinois 61242 Resident Inspector U. S. Nuclear Regulatory Comission 22712 206th Avenue North Cordova, Illinois 61242 Chairman

. Rock Island County Board of Supervisors W

1504 3rd Avenue Rock Island County Office Bldg.

Rock Island, Illinois 61201 Illinois Department of Nuclear Safety Office of Nuclear Facility Safety 1035 Outer Park Drive Springfield, Illinois 62704 Regional Administrator, Region III U. S. Nuclear Regulatory Comission 799 Roosevelt Road, Bldg. f4 Glen Ellyn, Illinois 60137

)

-__-