ML20125B164
| ML20125B164 | |
| Person / Time | |
|---|---|
| Site: | Callaway  |
| Issue date: | 12/01/1992 |
| From: | Schnell D UNION ELECTRIC CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| ULNRC-2731, NUDOCS 9212090234 | |
| Download: ML20125B164 (3) | |
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DonaldF. Schnen J IOsh7 Etscrusc Sena %ce President ncen 53 December 1, 1992 U.S.--Nuclear Regulatory Commission Attn:
Document Control Desk Mail Station P1-137 Washington, D.C.
20555 ULNRC-2731 Gentlemen:
CALLAWAY PLANT DOCKET NUMBER 50-483-REVISION TO TECHNICAL SPFCIFICATIONS 3.3.2 ENGINEERED SAFETY FEATURES ACTUATION SYSTEM INSTRUMENTATION AND 3/4.8.1 A.C.
SOURCES
Reference:
ULNRC-2717 dated. November 3, 1992 The referenced letter transmitted an application for amendment to Facility Operating License Number NPF-30 for the Callaway Plant.
This amendment application requests a revision to Technical Specifications 3.3'.2 and 3/4.8.1 to add Mode 5 and 6 applicability for the_ load shedder 3
emergency load sequencer and its supplying 4 KV Bus under voltage circuit.
Per our discussions with the NPC staff, we are submitting additional-information to support the Signifi' cant Hazards Evaluations previously transmitted.
The attached Significant Hazards Evaluation should be used to replace the previously submitted evaluation.
If you have any questions concerning this letter, please contact us.
Very truly.yours, b
i M' #&* "'-
080037
' Donald F.
Schnell j
WEK/ dis.
Attachment
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STATE OF MISSOURI )
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2 Alan C.
Passwater, of lawful age, being first duly' sworn.
upon oath says that he is Manager, Licensing and Fuels (Nuclear) for Union Electric Company; that he has read the foregoing document and knows the content thereof; that he has. executed the same for and on behalf of said company with full power and authority to'do so; and that the facts therein stated are true and correct to the best of his 4
knowledge, information and belief.
l By N
0-1
-Alan C.
Passwater Manager, Licensing and Fuels Nuclear l
SUBS (RIBED and sworn to before me this Lt d
- day of A 2 Av>n44 u
, 1992.
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C.rt s.,iNr J. YVAEF EGi ARY IUCUC, STATE OF MISSOU21 Mi COMMISSION EXPIRES APmL 22, 1933 ST. LOUIS COUNTY d
a cc:
T. A. Baxter, Esq.
Shaw, Pittman, Potts & Trowbridge 2300 N. Street, N.W.
Washington, D.C. 20037 Dr. J. O.
Cermak 4
l CFA, Inc.
18225-A Flower Hill Way Gaithersburg, MD 20879-5334 L.
Robert Greger 2
Chief, Reactor Project Branch 1 U.S. Nuclear Regulatory Commission Region III 799 Roosevelt Road Glen Ellyn, Illinois 60137 i
Bruce Bartlett Callaway Resident Office i
U.S. Nuclear Regulatory Commission RR#1 Steedman, Missouri 65077 L. R. Wharton (2)
Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory CTranlesion 1 White Flint, North, Mail Stop 13E21 11555 Rockville Pike Rockville, MD 20852 Manager, Eltatric Department Missouri Public Service Commission P.O. Box 360 Jefferson City, MO 65102 Ron Kucera Department of Natural Resources P.O. Box 176 Jefferson City, MO 65102 i
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Page 1 of 1 SIGNIFICANT HAZARDS EVALUATION This amendment application requests a revision to Technical Specification (T/S) 3/4.3.2 and Surveillance Requirement 4.8.1.2.
These specifications are revised to require the solid-state loed shedder emergency load sequencers (LSELS) and 4KV bus undervoltage devices be operable in plant modes 5 and 6.
Requiring the LSELS and 4 kV bus undervoltage devices to be operaole in Modes 5 & 6 enhances plant operability and safety in the shutdown modes.
Previously, T/S did not require the LOCA sequen m.-
or 4 kV undervaltage device to be operable since LOCA is not analyzed in Modes s & 6.
The shutdown sequencers were not required to be operable because plant operators were relied upon to take manual action to recover from a loss of offsite power.
Since this proposed change addc. operability requirements to T/S which result in a safety benefit, no significant hazards concern l
exists.
The proposed change does not involve a significant hazards consideration because operation of Callaway Plant with this change would not:
1.
Involve a significant increase in the probability or consequences of an accident previously evaluated.
The Callaway Satety Analysis Report has been reviewed and been found to be unaffected by this proposed change.
This change will not increase the probability or consequences of any i
accident or malfunction of equipment.
LSELS will be required to be operable in modes 5 and 6 which enhances plant safety in shutdown modes.
2.
Create the possibility of a new or different kind of t
accident from any previously evaluated.
This change increases the operability requirement for the LSELS.
There i
is no new type of accident or malfunction created and the method and manner of plant operation will only change by adding operability requirements for LSELS in MODES 5 & 6, which enhances plant safety in shutdown modes.
3.
Involve a significant reduction in a margin of safety.
The margin of safety remains unaffected since no design change is made and plant operation remains the same.
As discussed above, the proposed change does not involve a significant increase in the probability or consequences of an dCCident previously evaluated or create the possibility of a new or different kind of accident from any previously evaluated.
This change does not result in a significant reduction in a margin of safety.
Therefore, it has been determined that the proposed change does not involve a significant hazards consideration.
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