ML20009D865
| ML20009D865 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 07/20/1981 |
| From: | Lundvall A BALTIMORE GAS & ELECTRIC CO. |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8107240434 | |
| Download: ML20009D865 (6) | |
Text
[
BALTIMORE GAS AND ELECTRIC CHARLES CENTER.P. O. BOX 1475 BALTIMORE, MARYLAND 21203 July 20,1981 g
ARTHUR E. LUNOVALL,.JR.
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vice Pacsioce r F'
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8 Mr. *(arold R. Denton, Director I
Office of M ' lear Reactor Regulation 41 JUL 2 31981
- U U.S. Nucim.egulatory Commission u.s..uaw umuroa L Washington, DC 20555
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Subject:
Calvert Cliffs Nuclear Powe
' s'Nos.1 & 2 Docket Nos. 50-317 & 50-318 Request for Amendments
Reference:
(a) NRC letter dated 7/31/79 from R. W. Reid to A. E. L' advall, Jr., Amendments 40 and 22
Dear Mr. Denton:
Baltimore Gas and Electric Company (BG&E) hereby requests Amendments to Operating Licenses DPR-53 and DPR-69 for Calvert Cliffs Units Nos. I and 2, respectively, with the submission of the enclosed proposed changes to the Technical Specifications. These changes apply to both Units. The i?CR number shown on each change is for BG&E internal use only.
TECHNICAL SPECIFICATION CHANGES Change No. ! (FCR 81-1037)
Change paragraph 3.8.2.3 ACTION Statement b. to read as follows:
With one 125-volt DC battery and/or both chargers inoperable, except during surveillance testing per Specifications 4.8.2.3.2.c.2, 4.8.2.3.2.d and 4.b.2.3.2.e, within 2 hour2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />s:
1.
Restore the inoperable battery te OPER ABLE status or replace it with the Reserve Battery; and/or 2.
Restore at least one inoperable charger to OPER ABLE status or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in f
COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.
Change paragraph 3.8.2.3 ACTION Statement d. to read as follows:
With one 125-volt DC battery inoperable during surveillance testing of the battery per Specification 4.8.2.3.2.e, operation may continue provided the associated bus is being powered by the Reserve Battery and an OPERABLE charger.
8107240434 810720 DR ADOCK 05000317 p
PDR J
Change paragraph 4.8.2.3.2 to read as follows:
Each 125-volt battery bank and charger and the Reserve Battery shall be demonstrated OPERABLE:
Change paragraph 4.8.2.3.2.d.2.a to read as follows:
Batteries 11, 21 and Reserve:
Add an asterisk (*) to paragraph 4.8.2.3.2.d.2 as shown below At the completion of this battery test, the battery charger shall be demonstrated capable of recharging the battery *....
- Add a new asterisk at the bottom of page 3/4 8-10 with the following footnote:
- Not applicable when testing the Reserve Battery a
Change paragraph 4.8.2.3.2.e as follows:
delete the words "during shutdown *" and the corresponding asterisk footnote at the bottom of page 3/4 8-10.
Discussion and Justification The above changes will allow the substitution of the Reserve Battery, a fully-qualified safety grade battery, for any of the existing 125 volt DC batteries during
-operation or surveillance testing. The use of this battery during specific surveillance testing was previously approved by NRC in Reference (a). At that time, the battery was situated-in a temporary location on the turbine deck pending completion of the
. permanent location room. The NRC Safety Evaluation accompanying Reference (a) recognized the battery and associated equipment-to' be a fully-qualified safety-related backup battery system.
We have completed the installation of the battery, now designated the Reserve l Battery, in its permanent location, a new battery room on elevation 45' of the Auxiliary Building.. The details of the installation are provided in Attachment I and Figure 1.
The proposed changes detailed above are intended to:
1.
Allow the substitution of the Reserve Battery for any one of the existing 125-volt DC batteries determined to be inoperable; 2.- ' Allow the substitution of the Reserve Battery for any one of the existing 125-volt DC batteries, during operation, for surveillance or capacity testing; and 3.
Impose the same surveillance and testing requirements on the Reserve Battery as for the existing 125-volt DC batteries.
.2
4 Change No. 2 (FCR 81-1036):
Add a new subparagraph (e) to the Action Statement for paragraph 3.8.2.3 as follows:
- e. With one cell having a voltage decrease more tha 0.10 volts from the acceptance test value but still 2.10 vr s per Surveillance requirement 4.8.2.3.2.b.1, either restore /replact the cell or :eplace the affected battery with the Reserve battery within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> or be in hot standby within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> ad in cold shutdown within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.
Discussion and Justifii ation As presently worded, the technical specifications indicate that a battery which has c single cell voltage decrease of more than 0.10 from the acceptance test value per Surveillance Requirement 4.8.2.3.2.b.1 is inoperable and that ACTION Statement (a) applies, requiring corrective action within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />.
In reality, a battery cell whose voltage has decreased 0.10 volts from the acceptance test value but is still 2.10 volts is not necessarily a bad cell. The cell still has sufficient voltage to meet its design requirement as long as its voltage is 2.10 volts. Therefore, the presently allowed 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> for corrective action is unnecessarily restrictive from a safety standpoint and, in addition, does not provide sufficient time to carry out that corrective action before a shutdown is required. The requested change would allow the restoration / replacement of the affected cell or the substitution of the Reserve Battery and would allow sufficient time for doing so.
REQUIRED DATES FOR ABOVE CHANGES Change No. 1 is requested on a priority basis by July 31, 1981 or as soon thereafter as possible since we will be conducting battery surveillance at that time, and the Reserve Battery may be needed to substitute for one of *e existing batteries, should one be determined to be inoperable.
Change No. 2 is of a lower priority, and although it affects the same technical specification section as Change No.1, we have shown it separately so as to facilitate its processing without affecting the priority handling of Change No.1.
SAFETY REVIEW The enclosed changes have been reviewed by our Plant Operations and Safety Review Committee and Off-Site Safety and Review Committee, and they have concluded that the changes will not result it an undue risk to the public health and safety.
FEE DETER A" NATION We i. ave determined, pursuant to 10 CFR Part 170, that the requested changes incolve a single safety issue, i.e., the substitution of a Reserve Battery for an existing battery, and therefore constitute a Class III and a Class I amendment for Units 1 and 2, respectively. Accordingly, a check in the amount of $4,400.00 for the requisite fee will be sent under separate cover.
3
BALTIMORE G AS D' LECTRIC COMPANY
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BY-
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b!E. Lundvill, Jr.'
Vice Presiden;:, Supply STATE OF MARYLAND :
TO WIT:
CITY OF BALTIMORE :
Arthur E. Lundvall, Jr., being duly sworn, stated that he is Vice President of the Baltimore Gas ard Electric Company, a corporation of the State of Maryland; that he executed the foregoing Anundment for the purposes therein set forth; that the sta'.2ments made in said Amendment are true and correct to the best of his knowledge, information and belief; and that he was authorized to execute the Amendment on behalf of said corporation.
WITNESS My Hand and Notarial Seal:
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My Commission expires:
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cc:
- 3. A. Biddison, Esquire G. F. Trowbridge, Esquire Mr. E. L. Conner, Jr. - NRC Mr. R. E. Architzel - NRC 4
ATTACHMENT 1 A fully qualified, safety related,125 volt DC Reserve battery systen has been installed at Calvert Cliffs Nuclear Power Plant (CCNPP). This Reserve battery system vill be used to replace any one of the -four existing safety related 125 volt control batteries.
CCNPP Units Nos.1 and 2 have four safety related 125 volt DC buses l(Buses 11,12, 21 and 22) that are shared by both units. Each bus has its associated 1350 ampere-hour battery and h00 ampere battery chargers. The Reserve battery, rated at 1500 Ahr, is sufficient capacity to replace any of the existing batterics.
The' Reserve battery system basically includes a 1500 Ahr.
fully qualified battery, a 1200 ampere transfer switch and 1200 ampere disconnect switches.
(See Figure 1) The charger and its associated disconnect switches are non-safety related since they will never be electrically connected to the safety-related systems. The Reserve Battery is on a continuous float charge until which time it is transferred from the charger to the load.
The new system has been installed such that no permanent connections were made to the existing 125 VDC buses. This will guarantee no cross-connections between any of the 4 safety-related busses each of which is a different separation group. At the time of the. Reserve battery use as a replacement for-one of the four vital batteries, cables will be connected between the respective unit's 1200 ampere disconnect switch and the bus of the battery being replaced. Only one set of these cables have been fabricated, ensuring only one 125 VDC bus can be connected at a time to the Reserve battery. With the exception of this set of cabit s, the entire safety related portion of the Reserve
. battery system is permanently installed and available for use. This arrangement of a set of cables being utilized for the final connection to the 125 VDC bus, ensures compliance with the plant's single fnilure criteria.
All switching equipment is located in the cable spreading room, Elevation 27, where the existing DC Switchgear is located. The Reserve battery is permanently located in a new battery room on Elevation 45
- in the Auxiliary Building. This room sits directly over the cable spreading room which allows the shortest possible cable run in conduit to the switching equipment. The Reserve battery is enclosed with three (3) hour fire-rated valls. The Reserve battery room has sufficient ventilation and has fire and air flow detectors.
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