ML20054F644

Proposed Changes to Tech Specs 3/4.1.3.2 & 3/4.1.3.3 Re Movable Control Assemblies

ML20054F644
Person / Time
Site:	Beaver Valley
Issue date:	06/11/1982
From:	DUQUESNE LIGHT CO.
To:
Shared Package
ML20054F641	List: ML20054F640 ML20054F642 ML20054F644
References
NUDOCS 8206170184
Download: ML20054F644 (4)

Text

LI:11TI*G CO. JtTICM FOR CPGATIO.1 lentS:M) _ _ _

~

APPLICASILITf: FCOES I cnd 2*

ACTICM

a. If the Rcxf. Position Indicating System indic_ates(2) a pof.antially misalign ed rod (s). this indication shall be verified tsi:sdiately (within'15 pri minutes) by =easuring the analeg. rod position channel ary voltage. If this neasure::ent conf.r=s that a red is misaligned, Specification 3.1.3.1.cis applicable.

b. With a caxirm.a of one grcup demand position indicator por- bank'incperable, either:

1. Verify that all red position indicators for the affected bar.k are CPGAELE and that the most withdrawn rad and the least withdraw rod of the bank are within a maxism of 12 steps (indicated positica) of each other at least once per 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />, or 2.. Reduce THERML POWER to less than 50l of RATE TrEn PCWER within 8 hcurs.

C.

a r:azirum of cme analog rod position indicator per bank incperable ,

1. Deterr,ine red position for the affected ro y raeasuring the detector primary yoitage, as follows:

a. Dunediately i

b. If .th.a associated red moved greater 'than 6 steps (greater than 12 step if all the rods in the group have been determined to be within 6 steps of group demand count'er indicator by primary voltage measurements within the previous 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />)

c. At 4 hour4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> intervals if the affected rod (s) are*not fully inserted or withdrawn

! d. At 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> intervals' if the affected rod (s) are fully inserted cr l

I withdrawn, or,

2. Reduce l

8.hcurs, THERE POWER to less than 5Cf. of RATE TdERML PCdER wmin

d. With the Autcmatic Red Deviation Mccitar incperable, ?cwsR TEUATICs

=ay centinue. provided that the deviation between the indicated positions is checked by the operator at least once per ~4 hours. The previsions of Specification 3.0.4 are rot applicable.#

!206170184820611 DR ADOCK 05000 3E;ya y;.LLEv . L' TIT 1 3/2 1-20a FW2 GIM _ _ . _ _ _ _ _

REACTIVITY CONTROL SYSTEMS

1. A Licensee Event Report shall not be required to be filed with the NRC upon entry into this ACTION statement provided that the manual chesking of indicated rod positions is performed. All entries into this ACTION statement shall be included in the Monthly Operating Report.

BEAVER VALLEY - UNIT 1 3/4 1-20c PROPOSED WORDING

I REACTIVITY CONTROL SYSTEM 1

POSITION INDICATION SYSTEM-SHUTDOWN LIMITING CONDITION FOR OPERATION 3.1.3.3 The group step demand counter and at least two analog rod position indication channels per group shall be OPERABLE for each group of shutdown or control rods not fully inserted.

APPLICABILITY: Modes 3*#, 4*# and 5*#

ACTION:

With less than the above required position indicator (s) OPERABLE, immediately insert all rods or, innediately open the reactor trip system breakers.

SURVEILLANCE REQUIREMENTS 4.1.3.3 Each of the above required position indicator (s) shall be determined to be OPERABLE by performance of Specifications 4.1.3.2.1 and 4.1.3.2.2.

• With the reactor trip system breakers in the closed position.

1. The accuracy requirements of the analog rod position indication system are not applicable below Tavg of 547F due to known shift of the calibration of the analog rod position indication system at reduced plant temperatures. At plant temperatures below Tavg = 547F, the analog rod position indicators shall be used to provide general guidance in determining rod position and the group demand indicators shall be used to determine exact rod positions. The requirements set forth in 4.1.3.2.2b must be performed at a nominal average coolant temperature of 547F. During preparations for startup, the requirements of 4.1.3.2.2b may be waived until a nominal coolant temperature of 547F is reached.

BEAVER VALLEY - UNIT 1 3/4 '-21 PROP 03E3 WORDING

r.

ATTACHMENT B SAFETY EVALUATION The proposed changes to the Technical Specifications waive the accuracy requirements for the analog rod position indication system at Reactor Coolant System temperatures below 547F in Modes 3, 4 and 5 because of known shift in the calibration curve for these instruments at reduced plant temperatures. The operating practice at Beaver Valley Power Station is to maintain the shutdown banks fully withdrawn during plant heacup to permit rapid insertion of negative reactivity if required by unusual circumstances. Technical Specification 3.1.3.3 would effectively prevent this good operating practice since the accuracy requirements of the analog rod position indication system cannot be met at reduced plant temperatures. Further, calibration of the analog rod position indication system at reduced plant temperatures would be invalid at normal '

operating temperatures. Therefore, a footnote is proposed to be added to Section 3.1.3.3 to waive the accuracy requirements of the rod position indication system at nominal average coolant temperatures below 547F. In addition, the requirements of Section 4.1.3.2.2 are waived until a nominal average coolant temperature of 547F is attained so as to avoid recalibration of the analog rod position indication system under plant temperature conditions which would cause the accuracy of the instruments to be impaired as plant heatup progresses.

Guidance has been provided to the operator to use the analog rod position indication system as a general indication of rod position during heatup while relying upon the group demand indicators to provide specific rod position information.

Since accuracy of rod position indication does not affect the analysis of any accident in Modes 3, 4 and 5, the waiving of the accuracy requirements for the analog rod position indication system under the proposed conditions does not constitute an unreviewed safety question.

A proposed footnote change to 3.1.3.2 would alter the reporting requirements associated with operability of the Rod Deviation Alarm by waiving the requirement to file an LER and the substitution of a requirement to note the entries into ACTION 3.1.3.2d.

The Onsite Safety Committee and the Offsite Review Committee have reviewed this proposed technical specification and have determined that:

1) The proposed technical specifications do not increase the probability of occurrence or the consequences of an accident or malfunction of equipment important to safety previously evaluated in the Safety Analysis Report.

2) The proposed technical specifications do not create the possibility for an accident or malfunction of a different type than any evaluated previously in the Safety Analysis Report.

1

3) The proposed technical specifications do not reduce the margin of safety as defined in the basis for any technical specification.