ML20002C852
| ML20002C852 | |
| Person / Time | |
|---|---|
| Site: | Big Rock Point File:Consumers Energy icon.png |
| Issue date: | 02/09/1977 |
| From: | Bilby C, Bixel D CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8101120175 | |
| Download: ML20002C852 (5) | |
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, _.g M DCCKET 50-155 - LICE'ISE DPR BIG ROCK POINT PLANT - TECHNICAL SPECIFICATIONS CHANGE REQUEST Transmitted herewith are three (3) originals and thirty-seven (37) conformed copies of the proposed change to the Technical Specifications for the Big Rock Point Plant, Docket 50-155, License DPR-6.
The purpose of this change is to request a vaiver to extend the due date for certain survei] lance requirements of the Technical Specifications. Approval of tae change vould cancel the planned February 1977 outage and enable the Big Rock Point Plant to maintain power operations until the June 1977 refuel-ing outase.
By letter dated November 22, 1976 Consumers Power Company detailed the expected outages for the Big Rock Point Plant scheduled for 1977 In that letter we indicated that a LOCA qualified pressure transmitter (to be used as a backup technique to determine the adequacy of core ring spray flow in the event of a LOCA) would be installed during the then scheduled Janus:7 1977 outage.
If this outage (presently planned for February 1977) is can-celed, the pressure transmitter vill be installed during the scheduled re-fueling outage, June 15, 1977 David A Bixel Huclear Licensing Ad=inistrator i
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CONSUMERS POWER COMPANY Docket No 50-155 Request for Change to the Technical Specifications License No DPR-6 i
Reference:
A.
Technical Specifications for Big Rock Point Plant.
B.
Standard Technical Specifications for General Electric
. boiling water reactors revision of August 15, 1976.
Consumers Power Company requests a waiver to extend the meeting of certain surveillance requirements incorporated in Reference A.
The waiver is re-quested for the followinS:
Technical Specifications System / Subsystem Due Extend Until 5 2.2(a) i, 11, iii control Rod Drive 2/2h/TT 6/15/TT 5.2.3 Poison Valve Replacement 4/77 6/77
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Containment Spray Valve 2/26/77 6/15/77 1
Tests Table ll.h.3.h Containment Spray Sensor 2/26/77 6/15/77
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Tests 11.h.1.h.C Core Spray System Tests 2/26/77 6/15/77 Table 11.h.1.ha Core Spray System Sensor 2/26/77 6/15/77 Tests l
(1}This date includes the 25% time waiver specified in Reference A.
f At this time, an outage of the Big Rock Point Plant is scheduled for the middle i^
of February 1977 for the sole purpose of completing the aforementioned surveil-lance requirements.
It is expected that this outage will last approximately one week.
If these items could be waived until June 15, 1977 when a major refueling outage is scheduled, it is expected that the bib Rock Point Plant could be maintained operational at power until that time. The effect of this would be to save Consumers Power Company and its customers from 20 to h0 thou-sand dollars a day per day of outage.
Discussion
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l.- Control Rod Drive Sections 5.2.2(a) 1,11, iii of Reference A specify testing the performance of the control rod drive system including checking the rod position indicating 1
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system, the control rod latching and unlatching functions, the minimum with-drawal times and the scram times. The frequency of these tests for each control rod, in accordance with Reference A, is at least once every six months. Section k.l.3.2(c) of Reference B stipulates that the control rod parameters mentioned above be tested every 120 days for only 10% of the control rods.
This would mean that all control rods would have been tested within a cycle of approximately 3-1/2 years (excluding major outages and individual control rod maintenance).
Since all control rods at the 31g Rock Point Plant have been tested at six-month intervals, it is concluded that a waiver in this case until June 15, 1977 is warranted.
2.
Poison Valve Replacement Section 5.2.3 of Reference A requires that one squib primer and trigger assembly in the liquid poison system be removed and test fired every 12 months on an alternating basis, ensuring valve replacement every five years. Reference B, Sect 1on h.1 5.d.1, requires poison system initiation and explosive valve re-placement once every 18 months. At this tLee there ia a manufacturer's speci-I fication that the explosives used in the explosive valve are good for a 5-year period. This specification is based on shelf life and te=perature considera-H tions.
It is expected that after consulting the manufacturer and researching this requirement, an extension of two months on the life of the explosives will be found acceptable.
Consumers Power Companf'will forward the results of this investigation. If an extension of the life of the explosives is not warranted, the Big Rock Point Plant will be shut down in April to perform the required testing and valve replacement.
3 Containment Spray Sensor and System Tests Section 11.h.3.h(b) and Table 11.h.3.h of Reference A specify testing the containment spray system valve and sensors at a periodicity of six months.
While it is recognized that the containment spray system installed at the Big Rock Point Plant is not consistent with that addressed in Reference B, it should
- be noted that the containment spray system (dry well) specified in Section k.6.2.1 of Reference B requires an operability check only once every five years.
It is, therefore, requested that a vaiver until June 15, 1977 be, granted on the
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surveillance requirements for the containment spray valve and sensor tests specified in Reference A.
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Core Spray System and Sensor Tests Section 11.h.l.h.C and Table 11.h.1.ha of Reference A require automatic' actuation of the core spray system valves (with water flow blocked), an operational check i '
of the core spray recirculation system and an instrument trip test including valve actuation of the core spray valves, at a periodicity of six months. Ref-
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erence B, Section h.5 3.C, calls for a functional test, including automatic actuation of the system with flow blocked, of the core spray system once every j
18 months. - It is concluded that based on the guidelines established in Re rence B, an extension of the time specified for the surveillance requirements for che i
core spray system specified in Reference A is justified.
In summary, a vaiver is requested to extend the specified due date to the exten-sion date listed for the surveillance items delineated above. This request is based on meeting the requirements imposed by 10 CFR 50 within the guidelines presented by Reference B while noting that the specific surveillance frequency requirements of Reference A are more limiting than those projected by Reference B.
The approval of this vaiver also would allow power operation of the Sig Rock 7
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Point Plant through to June 15, 1977 when the major refueling outage is scheduled, 2
with no foreseeable outage occurring beforehand, and lead to substantial monetary savings for both Consumers Power Company and its customers.
Based on the foregoing, the Big Rock Point Plant Review Committee has concluded
- that this change does not involve a significant hazard consideration.
CONSUMERS POWER COMPANY
. By
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CRBilby,VicePrhdent i
Production 2: Transmission Sworn and subscribed to before me this 9th day of February 1977.
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Linda R Thayer, Hotary"4Public Jackson County, Michigan 4
My. commission expires July 9, 1979
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NRC F;Ru 195 u.s. NUCLE AR RE2ULATGOY Ce* *dlSSION DOCKET NUMEER J
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NRC DISTRIBUTION Fen PART 50 DOCKET MATERIAL
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Jackson, Mi D A Bixel ATE RECEIVE o 2,14,77 R ETTER ENOTORIZE D PROP tNPUT FORM -
NUMBER OF COPIES RECE8VED C" RiolN AL,
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DESCRIPTION ENCLOSU RE Ltr notarized 2-9-77.....trans the following:
Amdt to OL/ Change to'-Tech Specs:.Consistirig of revisions uith regard to a waiver of duc '
date for Certain surveillanCc requirements...
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PLANT NAME: Big Rock Point #1
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CU1 SAFETY FOR ACTION /INFORMATION RNVT_D_ n ASSIGNED AD:
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