ML20084J980
| ML20084J980 | |
| Person / Time | |
|---|---|
| Site: | Callaway  |
| Issue date: | 05/07/1984 |
| From: | Schnell D UNION ELECTRIC CO. |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| References | |
| ULNRC-814, NUDOCS 8405110050 | |
| Download: ML20084J980 (4) | |
Text
o UNION ELECTRIC COM PANY 1901 GRATIOT STREET ST. LO U I S, MISSOURI wasuNa aoo.as.:
P. O..oX.49 DON ALD E.CHNELL May 7, 1984
.r. Lou,.....ou Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Washington, DC 20555 ULNRC-814
Dear Mr. Denton:
DOCKET NUMBER 50-483 UNION ELECTRIC COMPANY CALLAWAY PLANT, UNIT 1 FIRE PROTECTION SYSTEM STATUS Fire protection at the Callaway Plant involves an in-depth, integrated system of design separation, noncombustible materials, automatic and manual suppression, heat and smoke detection, alarms, barriers, training,'and administrative controls.
Callaway FSAR Site Addendum Section 9.5.1.6 states that the fire protection program will be implemented before fuel loading.
To a large degree the total fire protection system has been installed and satisfactorily tested at the Callaway Plant.
A few construction and testing activities related to fire protection at Callaway are not complete.
We have reviewed the outstanding fire protection items and have concluded that they should not be a restraint to licensing.
In the area of passive fire protection, incomplete items are:
(1) final installation, inspection, and rework of wall and floor penetration seals, conduit seals, cable tray covers; and (2), application of fire proofing material on recently installed supports and on small areas of structural steel.
By May 15,
[
1984, the penetration seals will be complete in all safety-related buildings except for some areas in the Auxiliary and Control Buildings.
Similarly, incomplete conduit seals, cable tray covers, and applications of fire proofing material will be limited to a few areas in the Auxiliary and Control Buildings.
All safety-related areas that have incomplete passive fire protection items are protected by the fire detection and suppression systems as described in the FSAR.
Upon licensing, the Technical Specifications for compensatory actions (i.e. fire watches or fire watch patrols) will be implemented.
Compliance with the Technical Specifications will ensure that the integrated fire protection program is not degraded while the installation and inspection of passive fire protection items are in progress.
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,;r; Mr. Harold R.' Denton
'May.7,-19841
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-In1the area of active fire protection, all systems have been
~or: will' be satisfactorily tested by May 15, 1984 with two exceptions..-The first involves line-type thermal detectors used
'inside containment.. These detectors will be proven prior to fuel o
load withithe. exception of a portion installed on the cable trays i
on the~ control rod drive mechanism (CRDM) platform.
It is not I
practical to install and_ test-this portion until after fuel load and-replacement of the reactor vessel head.
Technical Specification compensatory measures (i.e. inspections or temperature monitoringl will be invoked until testing is i
complete.
It should also be.noted that Union Electric is
-re-evaluating the need for the thermal detectors in the CRDM trays ^and a design change in the future is possible.
1 The second-incomplete active protection measure is successful testing of the Halon systems in some plant areas as i
U
. described below.
The north electrical penetration room (fire farea A-18 of FSAR'Section 9.5B) is being-used as a data l
acquisition center.for required thermal and dynamic testing.
As such the room cannot be sealed and tested for a sustained'Halon concentration.
This' area has early warning' fire detection and manual fire fighting with hose stations and. portable fire extinguishers.
Technical Specification provisions (i.e. fire watch' patrol) willLbe invoked until this testing is complete.
.Th'e south' electrical penetration room (fire area A-17'of
~ FSAR Section 9.5B) has been successfully Halon tested with the
- exception of the upper-most. area inside a vertical electrical
. cable. chase.
In this area the Halon-concentration has not sustained'the required amount (5 percent minimum for 10 minutes).
Similarly in the control room (fire area C-27), the upper-most 7c
-portion of the: chase ~ leading to underfloor trenches has not i.
maintained the' required concentration.- Various design i
alterationsfare being considered - and : retests are underway.
It is
)
-possible that'a resolution to this problem will not be found by LMay 15, 1984.-
In this case, alternative' fire protection measures
'as discussed above for the north penetration room will be employed.
In summary, the extensive Callaway fire protection program
--is' essentially complete.. The exceptions discussed above will be
- Vigorously _ pursued:tofacceptable'. resolutions.
In all cases,
(.
compensatory' measures"will'be"in'effect such that the fire
. protection; system is not degraded.
With the exception of the
-north: electrical penetration-room-(. fire area A-18), all the above
.itemsLwill be completed prior torerceeding five percent power.
(Completion of sealing and Halon testing of the north electrical
+
, penetration: room will be completed after the'100% power data has been-taken-for-thermal and dynamic testing.
This is expected ito be completed prior to January, 1985.
Union Electric l
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.Mr.!Hcrold R. Danton May.7, 1984 T
Page 3 t
believes that fuel loading, startup testing, and plant operation
- should proceed while these matters are being resolved.
Very truly yours, i
Donald F.
Schnell DJW/lw.
cc:
W. L. Forney, NRC Region III B. H. Little, NRC Resident Inspector
- Missouri Public Service Commission L
~J. J. Holonich, NRC-NRR r
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m STATE OF MISSOURI )
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Donald F. Schnell, of lawful age, being first duly sworn opon oath says that he is vice President-Nuclear and an officer of 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 knowledge, information and belief.
By
/
Donald F. Schnell Vice President Nuclear SUBSCRIBED and sworn to before me this 7 b day of 198N DAken BARDAR J.PF FF NOTARY PUBUC, STATE OF MISSOURI MY COMMISSION EXPIRES APRIL 22,1935 ST. LOUIS COUNTY r
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