ML20237E419
| ML20237E419 | |
| Person / Time | |
|---|---|
| Site: | Clinton  |
| Issue date: | 08/24/1998 |
| From: | ILLINOIS POWER CO. |
| To: | |
| Shared Package | |
| ML20237E417 | List: |
| References | |
| NUDOCS 9808310267 | |
| Download: ML20237E419 (5) | |
Text
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t to U-603067 LS-98-010 Page 1 of 2 Proposed Channes to CPS TS Bases i
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AC Sources-Operating to U-603067 8 3.8.1 LS-98-010 Page 2 of 2 BASES i
l SURVEILLANCE SR 3.8.1.16 (continued)
REQUIREMENTS 1)
Unexpected operational events which cause the equipment to perform the function specified by this Surveillance, for which adequate documentation of the required performance is available; and Ar A #,4ie d tu 2)
Post maintenance testing that requires performance of i
k DMson 3 b6 3 this Surveillance in order to restore the component to OPERABLE, provided the maintenance was required, or
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performed in conjunction with maintenance required to r egoiced 40 casei maintain OPERABILITY or reliability.
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SR 3.8.1.17
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Demonstration of the test mode override ensures that the DG ope.raken and availability under accident conditions is not compromised as e m vre fc goe q the result of testing.
Interlocks to the LOCA sensing circuits cause the DG to automatically reset to hasis ara M.
ready-to-load operation if an ECCS initiation signal is r_eceived during operation in the. test mode.4 Ready-to-load H
eperation is defined as the DG running at rated speed and voltage with the DG output breaker open. These provisions for automatic switchover are required by IEEE-308 (Ref. 13),
paragraph 6.2.6(2).
1 The requirement to automatically energize the emergency loads with offsite power is essentially identical to that of SR 3.8.1.12.
The intent in the requirement associated with SR 3.8.1.17.b is to show that the emergency loading is not affected by the DG operation in test mode.
In lieu of.
actual demonstration of connection and loading of loads, testing that adequately shows the capability of the emergency loads to perform these functions is acceptable.
This testing may include any series of sequential, overlapping, or total steps so that the entire connection and loading sequence is verified.
The 18 month Frequency is consistent with the recommendations of Regulatory Guide 1.108 (Ref 9),
paragraph 2.a.(8); takes into consideration plant conditions (continued)
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CLINTON.
8 3.8-27 Revision No. 0 L___-___--________
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LS-98410 Page 1 of 3 ProDosed Changes to CPS USAR 1
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CPS-USAR Revision 7 LS-98-010
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June 1997 Page 2 of 3 or malfunction will occur and the present supply to the motor is adequate.
A similar motor is being utilized at LaSalle and other, plants and performance is covered by NEDO 10905 and is
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accepted by the NRC. (Q&R 040.16)
The division 3 HPCS diesel generator is capable of starting the i
HPCS motor within the required time in accordance with l
NEDO-10905 although voltage and frequency drop will exceed the limits specitied in NRU Regulatory Guide 1.9.
N, Mechanical safety trips recommended by the Division 3 diesel ggg) generator vendor and the electrical protective tripping scheme (identified on drawings E02-1HP99 sheets 101 through 114 and 1
referenced in Section 1.7) are consistent with the Division 1 and 2 diesel generator tripping schemes and meet the
. requirements of Regulatory Guide 1.9.
All trips except overspeed and generator differential are bypassed on a LOCA.
(Q&R 040.14)
The NS Guide.PS power supply is in full compliance with Regulatory 1.75, and no deviations will be taken. 'The final NSPS power supply design was available by November of 1981.
OQ&R 430.92)
In this way, the diesel generator availability is fully assured during an offsite power, loss.
8.3.1.1.3 Instrument Power System The NSPS power supply will be in ful1 compliance with Regulatory Guide 1.75, and no deviations will be taken.
00&R 430. 92) l The instrument power system consists of the followin'g major components:
(4)'
.120-Vac nuclear system protection system a.-
uninterruptible power supplies and buses.-
b.
(2) - 120-Vac nuclear system protection system RPS uninterruptible power supplies and buses.
c.
(2) - 120-Vac computer uninterruptible power supplirs.
d.
(2) - 120-Vac BOP instrument buses (120-Vac MCC distribution panels with regulating transformers).
e.
(3) - 120-Vac Class lE instrument buses (120-Vac MCC distribution panels with regulating transformers).
TJ The subsystem consisting of the (4) NSPS UPS's and associated
' buses, (divisional) the (2). RPS UPS 's excluding associated buses, (nondivisional) and the (3) 120-Vac instrument buses are Class 18.
The remainder of the subsystems listed above are
, non-safety related.
l 8.3-25
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to U-603067
- l LS-98-010 Page 3 of 3 INSERT FOR: USAR Section 8.3.1.1.2.1 (page 8.3-25):
The HPCS diesel generator is designed with a mechanical governor that always operates in the droop mode. In accordance with the Technical Specifications, manual operator l
action is required during testing in the test mode to ensure resetting of the governor. This ensures the required generator frequency following receipt of an ECCS signal while in the test mode.
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