A10020, Discusses Review of RI-91-A-231 Re Activities at Millstone Unit 2

Discusses Review of RI-91-A-231 Re Activities at Millstone Unit 2

ML20080L459
Person / Time
Site:	Millstone
Issue date:	12/23/1991
From:	Opeka J NORTHEAST NUCLEAR ENERGY CO.
To:	Hehl C NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20079Q807	List: A09664, Discusses Review of RI-91-A-0232 & RI-91-A-0263 Re Various Activities at Millstone Unit 2.W/related Matl A09849, Discusses Review of RI-91-A-0230 Re Activities at Millstone Unit 2 A09920, Discusses Review of R1-91-A-0219 Re Various Activities at Millstone Unit 2.W/related Matl A09945, Advises of Completion of Review of Identified Issues Re Activities at Millstone Concerning Case RI-91-A-0238 A09958, Discusses Review of RI-91-A-0243 Re Activities at Millstone Unit 2 A09961, Discusses Review of RI-91-A-0249,0253,& 0254 Re Various Activities at Millstone Unit 2.W/related Matl A09962, Discusses Review of RI-91-A-0260 Re Various Activities at Millstone Unit 2.W/related Matl A09963, Discusses Review of RI-91-A-262 Re Various Activities at Millstone Unit 2.W/related Matl A10017, Discusses Review of RI-91-A-0259 Re Various Activities at Millstone Unit 2.W/related Matl A10020, Discusses Review of RI-91-A-231 Re Activities at Millstone Unit 2 A10023, Discusses Review of RI-91-A-276 Re Various Activities at Millstone Unit 2.W/related Matl A10024, Discusses Review of RI-91-A-278 Re Various Activities at Millstone Unit 2.W/related Matl A10069, Discusses Review of RI-91-A-0289 Re Various Activities at Millstone Unit 2 ML20080K564 ML20080K689 ML20080K712
References
FOIA-92-162 A10020, NUDOCS 9503020204
Download: ML20080L459 (4)

Text

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December 23, 1991 l

1 Docket No. 50-336 A10020

Re

Employee Concerns l

4 Mr. Charles W. Hehl, Director

Division of Reactor Projects j U.S. Nuclear Regulatory Commission

Region I t

475 Allendale Road

King of Prussia, PA 19406 1

Dear Mr. Hehl:

1 Millstone Nuclear Power Station, Unit No. 2 RI-91-A-0231 i We have completed our review of identified issues concerning activities at i Millstone Unit No. 2. . As requested in your transmittal letter of November 19, i i 1991, our responses do not contain any personal privacy, proprietary, or i safeguards information. The material contained in these responses may be released to the public and placed in the NRC Public Document Room at your discretion. The NRC transmittal letter and our responses have received t controlled and limited distribution on a "need-to-know" basis during the 4

preparation of these responses.

1 i ISSUE 02

l "P1 ant Operation Review Comittee (PORC) actions are superficial. There are

' differe'nt calibration accuracy requirements between the Steam Generator

' radiation monitor functional test procedure (SP 2404A1), recently reviewed by the PORC, and a referenced source. Procedural problems also exist in the i RBCCW [ reactor building closed cooling water) radiation monitor calibration procedure, which was also recently reviewed."

REQUEST:

]

"Please discuss the validity of this assertion. Please provide assurance that the calibration accuracy requirements are correct and consistent and that procedural problems in the RBCCW are resolved."

i 1

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i 1 9503020204 940809 PDR FOIA g HUBBARD92-162 PDR

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.t Mr. Charles W. Hehl -

i A10020/Page 2 December 23, 1991 I

RESPONSE

Without knowing the identification of the " referenced source," it is difficult to determine the validity of the assertion.

The procedure at issue is a functional test procedure rather than a calibra- ,

tion procedure so the reference to.* calibration accuracy" is unclear. For the purpose of this response we have assumed the assertion was made in connection with a change made to Instrumentation and Controls (!&C) Forn 2404AI-I which is the form used by the procedure at issue.

Technicians performing this procedure in late October 1991 stopped when they noted that the procedure data sheet specified a high/ fail / alert bistable set point tolerance different from the G. < -ations Department calculation on OPS Form OP2383C-1. I&C Form 2404Al-1 specttied a flat + 20 percent toler-ance, while OPS Form 2383C-1 provided a tolerance that depended on the posi-tion of the set point within the decade (on a logarithmic scale). Both methods are acceptable to the NUSCO Radiation Assessment Branch (RAB) and yield tolerances that are within the 20 percent values that are expected for the. radiation monitor. The I&C form was changed on October 23, 1991, to coincide with the operations specified values. Following the change, the procedure was completed satisfactorily.

There is no safety or generic significance to this assertion. We were not aware of this concern prior to receipt of notification from the NRC.

Our response to issue RI-91-A-0238 dealt with Procedure SP 2404AW for the R8CCW liquid radiation monitor.

l ISSUE 04:

"The RBCCW radiation monitor (RM 6083) sample valves are not labeled.

Additionally, the piping and instrumentation drawing (P&ID) 25203-26022, Sheet No. 1, does not reflect the actual installed configuration 'of the sample lines. (This concern is similar to issue 210-1 referred to you by letter

, under File Number RI-91-A-0210, dated August 22,1991.)"

REQUEST:

"Please discuss the validity of this assertion. Please provide assurances that the RBCCW radiation monitor (RM 6083) sample valves will be labeled in the future and that piping and instrumentation drawings will reflect actual conditions."

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! Mr. Charles W. Nehl l A10020/Page 3 1 December 23 1991

! RESPONSE:

i

! With respect to the valve labeling issue, this assertion is a statement of i

fact describing the normal operating practice concerning the labeling of valves internal to vendor-supplied equipment.

l l The radiation monitor at issue is a " skid-mounted" piece ,of equipment which j . senses radiation levels in the RBCCW process fluid-and provides local and i

remote annunciation on high radiation. It is our standard practice that valves internal to the radiation monitor skid are not assigned unique numbers and labeled during installation. These valves are. not used to operate the i equipment; - therefore, there is no requirement that we provide Millstone Unit j No. 2 specific valve numbers or show the valves on applicable P& ids. The i valves external to the radiation monitor skid were labeled as part of our j ongoing labeling project for Millstone Unit No. 2.

! With respect to the P&lD sheet, this assertion is is a true statement but does 1

not represent a valid safety concern. The drawing at issue has been checked

' against actual systen and the installed configuration of the' sample lines was correct. However, a difference was found in that the lead brick shielding, i

which was removed when the monitor was upgraded to a unit not' requiring additional shielding, is still shown on the drawing. 'A drawing change has been issued to eliminate the lead bricks shown on the P&lD.

I We were not aware of this concern prior to notification by the NRC.

ISSUE 06:

.! "I&C technicians incorrectly started the Steam Jet Air Ejector (SJAE) radia-tion monitor (RM 5099) with the sample pump inlet valve shut. Subsequently, the motor failed to re-start. The sample pump was started by I&C Department

,i personnes. It should have been operated by Operations Department personnel."

I REQUEST:

3 "Please discuss the validity of this asser0 ion and provide assurances that the j stated problems with regard to the SJAE radiation monitor system operation are resolved with regard to safety requirements."

1 GENERAL REQUEST:

l f M1 ease provide your review of the above assertions. If the above conditions 1

are valid, notify us of the corrective actions you have taken to prevent Also provide us with an assessment of the safety significance of l recurrence.

1. any identified deficiencies, including generic considerations.'

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I6 Mr. Charles W. Hehl

! A10020/Page 4 December 23, 1991 i

, RESPONSE:

This assertion is not valid.

~

A review of work performed on this radiation i monitor over the last six months was conducted. No documented instance of the I above alleged activities by I&C technicians was found. Discussions with 11C i

and Operations Department staff personnel identified no similar concern or j generic problem. The operation of the RM-5099 radiation monitor is indepen-dently verified by the performance of Surveillance Procedure SP2404AT, " Steam i

Jet Air Ejector Radiation Monitor (RM-5099) Functional Test," prior to return-

ing to service. Operations Procedure OP2383A also verifies proper start-up

! and operation of the sample pump, and it is performed by Operations department personnel.

We were not aware of these assertions-prior to receipt of notification from the NRC.

After our review and evaluation of these issues, we find that these issues did not present any indication of a compromise of nuclear safety.

We appreciate the opportunity to respond and explain the basis of our actions.

Please contact my staff if there are further questions on any of these matters.

Very truly yours, NORTHEAST NUCLEAR ENERGY COMPANY J. F. Opeta-k-blL" Executive Vice President cc: W. J. Raymond, Senior Resident Inspector, Millstone Unit Nos.1, 2, and 3 E. C. Wenzinger, Chief Projects Branch No. 4, Division of Reactor Projects E. M. Kelly, Chief, Reactor Projects Section 4A J. T. Shediosky, U.S. Nuclear Regulatory Commission, Millstone

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