ML20196B101
| ML20196B101 | |
| Person / Time | |
|---|---|
| Site: | Callaway  |
| Issue date: | 02/03/1988 |
| From: | Blosser J UNION ELECTRIC CO. |
| To: | Davis A NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| Shared Package | |
| ML20149B559 | List: |
| References | |
| ULNRC-1715, NUDOCS 8802080238 | |
| Download: ML20196B101 (2) | |
Text
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" Union Etscraic m
Canaway Plant February 3, 1988 NICAITY~Reing bb.N@
r t nr-Mr. A. Bert Davis p#f4
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Regional Administrator pn, j-U. S. Nuclear Regulatory Commission lii P 'J,--
Region III bd
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799 Rovsevelt Road Glen Ellyn, IL 60137 ULNRC-1715
Dear Mr. Davis:
DOCKET NO. 50-483 CALLAWAY PLANT FACILITY OPERATING LICENSE NPF-30 REQUEST FOR ENFORCEMENT DISCitFTION This letter documents Union Electric's regt.st for enforcement discretion in the matter of relief from Technical Specification 3.0.3, plant shutdown action requirements, due to the apparent inoperability of both trains of Essential Service Water (ESW).
Union Electric's oral request for enforce-rent discretion was granted at 1607 CST on February 2, 1988.
This letter explains our rationale for the request.
At 0930 CST on February 2, 1988, a member of the utility's ESW Safety Systems Functional Assessment (SSFA) group discovered that the concrete masonry unit (CMU) walls separating each train of the ESW pumps from their associated electrical panels were in excess of the design height of 6 ft.
for these walls. The walls function as splash screens.
An immediate review of design documents by members of the SSFA revealed an architectural (Bechtel, Inc.) seismic design calculation that limited the CMU wall height to 6 ft. 3 in.
Incident Report 88-22 was initiated at 1140 CST to document the design concern.
Bechtel was immediately requested to review Callaway's design records in an attempt to gather additional infor-mation, if any, that could (1) explain why the ESW CMU walls were built to 8 ft. 9 in., or (2) justify the as-built condition in lieu of their previ-ous seismic calculation. Also, installed support brackets on the CMU walls, similar to those used on II/I walls, were not shown on the plant drawings, addits to the confusion to the required design.
In the meantime, efforts were begun to lower one CMU wall to 6 ft.
Upon receipt of information from Bechtel, that there were no design documents available to support the wall height above 6 ft. 3 in., the plant 980E080238' gat-ct9 8 19881 um Acarsx po sox c:n runort uo as2s1
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ULNRC-1715 Page 2 of 2 entered. Technical Specification 3.0.3 at 1510 CST and our NRC senior resident inspector was informed of the condition.
The ESW CMU wall height was greater than required for seismic qualifications and potentially
. jeopardized the operability of.both trains of ESW pumps during a seismic ~
event.
This was considered a reportable condition per 10CFR50.72(a)(2)(v).
Union Electric's need for Callaway's electrical power was high due to reduced availability of other Union Electric plants and the extreme weather within our service area.
Since efforts to lower one train's CMU wall were nearly complete, a verbal request for enforcement discretion was made in order to prevent a plant shutdown and the ensuing transient that would be.
imposed by Technical Specification 3.0.3.
Train "B" of ESW was returned to an operable condition, Technical Specifi-cation 3.0.3 was exited, and Technical Specification 3.7.4, action statement for the remaining train, was met at 1725 CST on February 2, 1988.
Restoration of Train "A" is expected to be complete by 1700 CST today.
An Operating License Amendment is not required. A Licensee Event Report will be submitted pursuant to 10CFR50.73.
If you have any questions regarding this condition, please contact me at 314/676-8190.
Very truly yours, l
A det.)
l J. D. Blosser Manager, Callaway Plant TPS/JDB/cs cc: Distribution attached
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cc distribution lfor ULNRC-1715
-Mr.:J. M.-Hinds'_
.Mr.. Thomas.W.fAlexion (2' copies)'
Chief, Project Section 1A Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory' Commission U. S. Nuclear Regulatory-Commission Region III 7920 Norfolk Avenue 799 Roosevelt Road Mail Stop P-316
' Glen Ellyn, IL 60137 Bethesda, MD 20014 American Nuclear Insurers Mr. O._Maynard c/o Dottie Sherman, Library
. Wolf Creek Nuclear Operating Corp.
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The Exch'ange Suite 245 P. O. Box 411 270 Farmington Avenue Burlington, KS 66839 Farmington, CT 06032 Mr. Merlin Williams Manager, Electric Department Supt. of Regulatory Quality &'
Missouri Public Service Commission Administrative Services
-Office of Inspection & Enforcement Wolf Creek Nuclear Operating Corp.
P. O. Box 360 P. O. Box 411 Jefferson City, MO 65102 Burlington,.KS 66839-Records Center U.S. Nuclear Regulatory Commission Institute of Nuclear Power Operations Docuuent Control Desk Suite 1500 Washington, D.C.
20555 1100 Circle 75 Parkway Atlanta, GA 30339 NRC Resident Inspector D. F. Schnell (400)
R. J. Schukai (470)
G. L. Randolph J. F. McLaughlin i
T. P. Sharkey (Z40LER)
(Z40LER) (w/c)
W. R. Campbell R. P. Wendling (470)
F. D. Field (480)
A. P. Neuhalfen A. C. Passwater/D. E. Shafer/D. J. Walker (470)
G. A. Hughes Z170.03 (QA Record) i M. S. Evans J. F. Hogg M. E. Taylor H. Wuertenbaecher, Jr. (100)
S. L. Auston (470)(NSRB)
S. J. Bellers/J. D. Schnack JDB Chrono 3456-0021.6 3456-0260 Z40ULNRC A160.761 Date (Sandra Auston) (470) a