ML20034A810
| ML20034A810 | |
| Person / Time | |
|---|---|
| Site: | Byron  |
| Issue date: | 04/18/1990 |
| From: | Richter M COMMONWEALTH EDISON CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| IEB-88-011, IEB-88-11, NUDOCS 9004240372 | |
| Download: ML20034A810 (2) | |
Text
q o pp. z f~h Commonwealth Edison
.[
O ) 1400 Opus Pl!.ce
' Downers Crovi, Illinols 60515 '
g s
April 18,1990-
. U.S. Nuclear Regulatory Commission Attn:- Document Control Desk Washington, D.C.
20555
Subject:
Byron Station Unit 1 Pressurizer Surge Line Inspection.for NRC Bulletin 88-11 i
NRC Docket No. 50-454
References:
(a) NRC Bulletin 88-11', dated December 20, 1988.
-l (b)
M. Richter (CECO) letter to U.S. NRC, dated March 7, 1989.
(c) ' M. Richter (CECO) letter to U.S. NRC, dated i
May 31, 1989.
j Dear Sir NRC Bu11etin-88-11 (Bulletin) addresses pressurizer surge line integrity in light of previous occurrences of unexpected thermal movement of~
j
'the line due to thermal stratification. The Bulletin requested.that PWR licensees establish and implement a program to confirm pressurizer surge line L
integrity in view of the occurrence of thermal stratification,-and to inform
{
the staff of the actions taken to resolve this issue.
I Bulletin Action 1.a requested that licensees conduct a vistial!
I inspection of the pressurizer surge line at the first available cold shutdown j
which exceeds seven days. Since receipt of the. Bulletin, the first available-
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- cold shutdown which e'xceeded seven days for Byron Unit 1 occurred during the recent refueling outage (January 1990). During the refueling' outage, a visual l
inspection of the unit's pressurizer surge line was performed. Additionally,.
.)
the inspection included the rigid supports, variable (spring can) supports, 1
and whip restraints associated with the surge line. This inspection, which j
was performed by a qualified visual (VT-3/4) examiner, revealed no abnormal I
conditions.
It should be noted that the surge line does not contain any
.i l
This completes Bulletin Action 1.a for Byron Station since the. surge line inspection for Unit 2 was completed previously, as reported in References 1
(b) and (c).
l L
9004240372 900418 PDR ADOCK 05000454 a
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--t Document Control Desk. ' April 18, 19901
,=
As indicated in. Reference (c), Commonwealth Edison Company has 4
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committed to address the remaining requirements of the Bulletin'for. Byron Station by the end of December 1990.
Please direct any questions that you may have.concerning this response to this office.
Respectfully',-
h hwYo M. H. Richter Generic-Issues Administrator cc:
A.B. Davis - Regional Administrator, Region III Resident Inspector - Byron P. Shemanski - NRR Project Manager
/Imw:0894T 0FFICIAL SEAL LEROY R. RANSOME NOTARY PUBLIC STATE OP 1111N0lS MY COMMISSION EYP. Akit f.!C'3 Subscribed and Sworn to before rye this /8 Tdday of Apib i
, 1990.
LL&<-r W
f d Nop ry' Puhtic
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