The Roman Catholic bishops of the Netherlands have issued a pastoral letter that condemns the production and deployment of the new generation of medium-range nuclear weapons.

Like their U.S. counterparts, the Dutch bishops hold that nuclear deterrence is morally acceptable only as a step toward total disarmament. The statement urges Western powers to move unilaterally to control and reduce nuclear arsenals, but does not advocate unilateral disarmament.

The Dutch hierarchy also echoed the views of American Catholic bishops in condemning any first use of nuclear weapons and opposing the use of such weapons against population centers. "A justified defense of peace and freedom may not be based on means which are out of proportion and for that reason not justified," the pastoral said.

The Dutch pastoral is viewed as a strong boost to the West European peace movement, which is planning demonstrations this fall against the deployment of new medium-range nuclear weapons in Western Europe.

Billy Graham's "Hour of Decision" radio program is now being heard, in Russian, in the Soviet Union. The English script is translated into Russian, recorded by the Mennonite Brethren Communications in Winnipeg, then sent for broadcast over 500,000-watt evangelical stations in Ecuador and Monte Carlo.

The major controversy over what Billy Graham said about religion in the Soviet Union during his visit there last year has not affected finances of his evangelistic association. The Minneapolis-based unit reported income of $44.4 million last year, up $1.2 million from 1981.

Graham says he was misquoted and his words taken out of context in Moscow last year when his quoted remarks appeared to minimize religious restrictions in the U.S.S.R.

An international symposium on Gregorian chant in the liturgy, sponsored by Catholic University, will feature five public performances. Tomorrow at 6 p.m., choirs from Switzerland, West Germany and this country will participate in a liturgy at the National Shrine of the Immaculate Conception, with Catholic University's Msgr. Frederick R. McManus as homelist and Washington Archbishop James A. Hickey celebrating.

Monday at 8 p.m., solemn vespers and the medieval liturgical music drama "Peregrinus" will be presented at the Shrine. Tuesday at 4 p.m. combined choirs will sing "Liber Cantualis" and "Gradual Romanum" at the Shrine. Tuesday at 8:30, combined choirs and orchestra will present a concert at St. Matthew's Cathedral. The series concludes Wednesday at 9 a.m. with an organ recital in St. Vincent's Chapel on the Catholic University campus. For other details, call 635-5414.

Dr. Edmund D. Pellegrino, a former president of Catholic University and currently professor of medicine at Georgetown University, has been named director of the Kennedy Institute of Ethics at Georgetown. . . . William Moremen has resigned as pastor of the First Congregational Church-United Church of Christ here to accept a similar post at Eden United Church of Christ in Hayward, Calif. . . . The Rev. Richard L. Worden, pastor of Annandale United Methodist Church, has been appointed district superintendent of the Alexandria district, succeeding the Rev. R. Beverly Watkins, who is retiring . . . . Episcopal Bishop John T. Walker has been elected president of the board of the Council of Churches of Greater Washington.