ML17285A709

Requests Temporary Relief from Tech Specs Surveillance Requirement Re Average Power Range Monitor Flow Biased Simulated Thermal Power Upscale Function

ML17285A709
Person / Time
Site:	Columbia
Issue date:	09/05/1989
From:	Powers C WASHINGTON PUBLIC POWER SUPPLY SYSTEM
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
GO2-89-152, TAC-74567, NUDOCS 8909130212
Download: ML17285A709 (3)

Text

ACCELERATED D1QR1BU'EON DEMONS'T10N SYSTEM REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)

ACCESSION HBR:8909130212 DOC.DATE: 89/09/05 NOTARIZED- NO DOCKET FACIL:50-397 WPPSS Nuclear Project, Unit 2, Washington Public Powe 05000397 AUTH. NAME AUTHOR AFFILIATION POWERS,C.M. Washington Public Power Supply System RECIP.NAME RECIPIENT AFFILIATION Document Control Branch (Document Control Desk)

SUBJECT:

Requests temporary relief from TS surveillance requirement 4.3.1.3,Table 3.3.1-2,Item 2.b.

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TOTAL NUMBER OF COPIES REQUIRED: LTTR 28 ENCL

sz WASHINGTON PUBLIC POWER SUPPLY SYSTEM P.O. Box 968 ~ 3000 George Washington Way ~ Richland, Washington 99352 September 5, 1989 G02-89-152 Docket No. 50-397 U. S. Nuclear Regulatory Commission Attn: Document Control Desk Mail Station Pl-137 Washington, D.C. 20555 Gentlemen:

Subject:

NUCLEAR PLANT NO 2 RE/VEST FOR TEMPORARY RELIEF FROM TECHNICAL SPECIFICATION SURVEILLANCE REQUIREMENT 4.3.1.3, TABLE 3.3.1-2, ITEM 2.b The purpose of this letter is to request relief from the Technical Specification surveillance requirements applicable to the Average Power Range Monitor flow biased simulated thermal power upscale function.

Table 3.3.1-2 states that the RPS response time of this function is to be measured at less than or equal to (LE) 0.09 seconds. not including the simulated thermal power time constant of 6 +1 seconds. This requires that the 0.09 second limit be measured independently of the 6 second simulated thermal power time constraint.

Present HNP-2 surveillance procedures, PPM 7.4.3.1.3.5, .6, .7 and .8 and the plant design do not provide for independent measurement of these two values.

I The PPM requires that the measured time response be less than or equal to 7.09 seconds. The values measured have been in the range of 5.5 to 6.0 seconds.

Thus, there is not a safety concern in that the total delay, which is the value of significance is being maintained. Also, there are no safety analysis that take credit for this function.

S909130212 890905 'i PDR ADOCK 05000397 P PDC j~

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P'age Two RE/VEST FOR TENPORARY RELIEF FROM TECHNICAL SPECIFICATION SURVEILLANCE REQUIREMENT 4.3.1.3, TABLE 3.3.1-2, ITEN 2.b

~ l However, as the cited Technical Specifications require the RPS response time of LE 0.09 seconds be measured separately, the Supply System is not in strict compliance with the Technical Specifications. As the plant design does not provide for direct measurement of this time delay the plant has been forced into Action 4 of Table 3.3.1-1 that requires the plant be in at least startup within 6 hours.

As the above mentioned surveillance procedures have as an acceptance criterion a total time delay of less than 7.09 seconds, which is being maintained, and because this function is not taken credit for in any safety analysis, we believe that the plant can continue to be operated safely.

We plan to submit an emergency technical specification change request to provide for surveillance of the simulated and RPS delay as one value similar to that required by the Fermi, Unit 2 technical specifications.

To prevent a forced shutdown of WNP-2 the requested relief will be required by 6:30 P.D.T September 5, 1989.

Very truly yours, C. M. Powers, WNP-2 Plant Manager AGH/bk cc: JB Hartin, NRC RV RB Samworth, NRC NS Reynolds, BCP8R DL Willimas BPA/399 C Eschels - EFSEC NRC Site Inspector - 901A