ML20037D572
| ML20037D572 | |
| Person / Time | |
|---|---|
| Site: | Perry  |
| Issue date: | 08/13/1981 |
| From: | Tedesco R Office of Nuclear Reactor Regulation |
| To: | Davidson D CLEVELAND ELECTRIC ILLUMINATING CO. |
| References | |
| NUDOCS 8108270587 | |
| Download: ML20037D572 (5) | |
Text
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M f 3 1981
.. ~
p ' 7 Docket l'os.
50-440 V
ar.i 50-441 As C)
(
Mr. Dalwyn R. Davidson.
Qt g
.N Vice President - Engineering Dft.e [
1 cf Cleveland Electric Illminating Company 3
P. O. Box 5000 g
Cleveland, Ohio 44101 v 't e a
j near Mr. Davidson:
~
D Suh.iect: Request For Additional Information - Power Systems In the perfomance of the Perry licensinn review, the staff has identified ~
concerns in reoard to nower systems. The infomation that we require is identified in the enclosure. - These questions concern Chapter 8 of the FSAR and are sunnlemental to those sent to you on July 22, 1981. Our previous request for power systems information contained an error in the numberino notation. Requests 040.73 through 040.95 should have been 430.73 throunh 430.95 We renuest that you provide the infomation not later than October 1, 1091.
If you require any clarification of this mauest, please contact P". D. Ifouston, project Manager, (301) 492-R593.
Sincerely,
[sgins M-d hv-Ro..
L desco, Assistar.t Director for Licensing O
Division of Licensing
Enclosure:
Distribution:
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NRC FORM 314 (10 80) NRCM 0240 OFFICIAL RECORD COPY usa,o; m i_ m
3 r-5 Mr. Dalwyn R. Dhvidson Vice President, Engineering The Cleveland Electric Illuminating Company l
P. O. Box 5000 Cleveland, Ohio 44101 i
cc: Gerald Charnoff, Esq.
Shaw, Pittman, Potts & Trowbridge 1800 M Street, N. W.
Washington, D. C.
20036 l
Donald H. Hauser, Esq.
Cleveland Electric Illuminating Company l
P. O. Box 5000 Cleveland, Ohio 44101 U. S. Nuclear Regulatory Commission Resident Inspector's Office Pannly at Center Road Perry, Ohio 44081 Donald T. Ezzone, Esq.
Assistant Prosecuting Attorney 105 Main Street Lake County Administration Center Painesville, Ohio 44077 l
Tod J. Kenney 228 South College Apt. A j
Cowling Green, Ohio 43402 Daniel D. Wilt Wagman, Hesiler & Vanderberg 7301 Chippewa Road, Suite 102 Brecksville, Ohio 44141 Jeff Alexander 920 Wilimington Ave.
Dayton, Ohio 45420 Terry Lodge, Esq.
l 915 Spitzer Building l
Toledo, Ohio 43604 1
s
ENCLOSURE a
430.0 Power Systems Bran h l
430.96 You state in section 8.3.1.1.2.4 that on loss of preferred power supply, (8.3.1) a manual transfer to the alternate ireferred power supply can be accomplished by closing the alternate preferred tupply feeder breaker.
Explain whether on the loss of preferred power supply, the diesel generators would automatically connect to the emergency buses.
It is not clear whether the alternate preferred power source is used when the t
l normal preferred power source is under maintenance or you use the alternate feed if the normal preferred power is lost..In tise latter case you would need an automatic search circuit.
Revise your FSAR accordingly.
430.97 Yc. state on page 8.1-8 that int (rrupting devices actuated only by (8.1) fault current a're not considered to be isolat'on devices, unless acceptable coordination can be verified by test.
For this alternate approach, you have r.ot described whether you are using two breakers in series.
In a separate section, describe in detail, at all voltage
~
levels, the isolation devices being used.
430.98 Section 8.3.1.1.3.2.b.3 states that only the generator differential and (8.3.1) overspeed trip functions will shut down the diesel generator after c l
start resulting from a LOCA signal.
Nonessential trip functions are I
bypassed upon receipt of a LOCA signal.
Figure 8.3-6 shows that you are rei.aining the D/G loss of excitation trip. This relay should have l
been shown along witt, other protective relayr, in standby power supply l
shutdown logic.
Revise the logic diagram or provide a coincident logic if you want to retain loss of excitation trip upon receipt of a LOCA signal.
430.99 We require that upon receipt of a LOCA signal when in a test mode, the (8.3.1)
D/G breaker should be tripped.
Your logic diagrams 8.3-6 and 8.3-8 do not comply with this. requirement.
Refer also to Q 430.84.
430.100 Yau state on p. 8.3-44 that the topical report on HPCS diesel generator (8.3.1) prototype qualificatica program will be further ammended to include the results of prototype qualification tests.
In staff's opinion start and load acceptance test (300 start test) was not performed on this type of diesel generator.
Submit the results of the qdalification program when available.
430.101 It is stated on page 8.1-8 that the electrical penetration assemblies (8.3.1) are designed an,d applied in accordance with R.G. 1.63.
Your description of the compliance with the above regulatory guide is not adequate.
The circuit overload protection system should conform to the criteria of IEEE Std. 279.
Provide us with the coordination curves for the electrical penetration and describe in detail, at all voltage levels, how you meet R.G. 1.63.
430.102 Secticn 8.3.1.4.1.7 " separation of Class 1E and Non-Class lE Cables" (8.3.1) does not state the separation distance between Class lE and Non-Class lE cables. Provide the above information.
1
430.103 You state in section 8.3.2.1.2.2 that for Class lE Division 1 and (8.3.2)
Division 2 the battery chargers are sized to supply the battery to a fully charged condition from the design minimum charge of 1.75 V/ cell within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.
For Division 3 you have not specified the time limit.
Provide the time limit required to fully recharge a fully discharged battery while the charger is also supplying the largest conibined demand of the steady state de bus loads irrespective of the status of the plant during which these demands occur.
d 430.104 Describe the design criteria used in selection of Class lE equipment:
(9,3.1) 1.
Service factor of motors.
2.
Ability of the motors to accelerate their loads with 89% of the motor rated voltage at the motor terminals.
3 Selection of transformer impedances to permit starting of the largest motor on the bus without exceeding a maximum voltage drop of 20 percent and at the same time remaining within the inter-rupting and momentary capabilities of the breakers.
(SRP 8.3.1-III.4.)
430.105 State %, ether battery chargers incorporate protection to preclude ac (8.3.2) supply saurce to become a load on the battery upon loss of ac input power.
(SRP 8.3.2-III.2.)
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